Radio frequency apparatus

A radio frequency apparatus comprising:

• a tuner unit which includes
• a tuner unit metal housing which has a connection portion,
• a tuner input terminal for receiving a radio frequency signal,
• a mixer circuit which is connected for receiving a radio frequency signal of said tuner input terminal,
• an oscillation circuit which outputs a signal having a designated frequency based on a receiving channel to said mixer circuit, and
• a timer output terminal for outputting an intermediate frequency signal of said mixer circuit,
• wherein said mixer circuit and said oscillation circuit are disposed in said tuner unit metal housing, and said tuner unit is selected from a plurality of such tuner units which are of different kinds but which have a common design for said connection portion,
• a demodulation unit which includes
• a demodulation unit metal housing which has a connection portion,
• a demodulation input terminal for receiving said intermediate frequency signal of said tuner output terminal,
• a demodulation circuit which is connected to receive an intermediate frequency signal of said demodulation input terminal, and which is disposed in said demodulation unit metal housing, and
• a demodulation output terminal for outputting a signal of said demodulation circuit,
• wherein said demodulation unit is selected from a plurality of such demodulation units which are of different kinds but which have a common design for said connection portion,
• connecting means connecting an outside wall of said tuner unit metal housing to an outside wall of said demodulation unit metal housing by attaching said connection portion of said tuner unit metal housing to said connection portion of said demodulation unit metal housing, whereby said tuner unit metal housing and said demodulation unit metal housing are connected together to form a unitary body, and
• a connector which is arranged near facing walls of said tuner unit metal housing and said demodulation unit metal housing, and which is electrically connected between said tuner unit and said demodulation unit so as to apply said intermediate frequency signal to said demodulation circuit.

A radio frequency apparatus comprising:

• a tuner unit which includes
• a tuner unit housing which has a connection portion,
• a tuner input terminal for receiving a radio frequency signal,
• a mixer circuit which is connected for receiving a radio frequency signal of said tuner input terminal,
• an oscillation circuit which outputs a signal having a designated frequency based on a receiving channel to said mixer circuit, and
• a tuner output terminal for outputting an intermediate frequency signal of said mixer circuit,
• wherein said mixer circuit and said oscillation circuit are disposed in said tuner unit housing, and said tuner unit is selected from a plurality of such tuner units which are of different kinds but which have a common design for said connection portion,
• a demodulation unit which includes
• a demodulation unit housing which has a connection portion,
• a demodulation input terminal for receiving said intermediate frequency signal of said tuner output terminal,
• a demodulation circuit which is connected to receive an intermediate frequency signal of said demodulation input terminal, and
• a demodulation output terminal for outputting a signal of said demodulation circuit,
• wherein said demodulation unit is selected from a plurality of such demodulation units which are of different kinds but which have a common design for said connection portion, and
• connecting means connecting an outside wall of said tuner unit housing to an outside wall of said demodulation unit housing by attaching said connection portion of said tuner unit housing to said connection portion of said demodulation unit housing, whereby said tuner unit housing and demodulation unit housing are connected together to form a unitary body, and
• a subsidiary substrate which is arranged to electrically connect between said tuner output terminal and said demodulation input terminal.

A radio frequency apparatus comprising:

• a tuner unit which includes
• a tuner unit metal housing which has a connection portion,
• a tuner input terminal for receiving a radio frequency signal,
• a mixer circuit which is connected for receiving a radio frequency signal of said tuner input terminal,
• an oscillation circuit which outputs a signal having designated frequency based on a receiving channel to said mixer circuit,
• a PLL circuit which controls oscillation frequency of said oscillation circuit by receiving predetermined data based on said receiving channel,
• a data input terminal which is arranged on a flank wall of said tuner unit metal housing, and said flank wall has a power source terminal for operating said tuner unit, and
• a tuner output terminal for outputting an intermediated frequency signal of said mixer circuit;
• wherein said mixer circuit and said oscillation circuit are disposed in said tuner unit metal housing, and said tuner unit is selected from a plurality of such tuner units which are of different kinds but which have a common design for said connection portion,
• a demodulation unit which includes
• a demodulation unit metal housing which has a connection portion,
• a demodulation input terminal for receiving said intermediate frequency signal of said tuner output terminal,
• a demodulation circuit which is connected for receiving an intermediate frequency signal of said demodulation input terminal, and which is disposed in said demodulation unit metal housing, and
• a demodulation output terminal for outputting a signal of said demodulation circuit,
• wherein said demodulation unit is selected from a plurality of such demodulation units which are of different kinds but which have a common design for said connection portion,
• connecting means connecting an outside wall of said tuner unit metal housing to an outside wall of said demodulation unit metal housing by attaching said connection portion of said tuner unit metal housing to said connection portion of said demodulation unit metal housing, whereby said tuner unit metal housing and said demodulation unit metal housing are connected together to form a unitary body, and
• a connector which electrically connects said tuner unit to said demodulation unit when said tuner unit metal housing is mechanically connected to said demodulation unit metal housing.

A radio frequency apparatus comprising:

• a tuner unit which includes
• a tuner unit metal housing which has a connection portion,
• a tuner input terminal for receiving a radio frequency signal,
• a mixer circuit which is connected for receiving a radio frequency signal of said tuner input terminal,
• an oscillation circuit which outputs a signal having a designated frequency based on a receiving channel to said mixer circuit,
• a tuner output terminal for outputting an intermediate frequency signal of said mixer circuit, and
• a tuner power source terminal which is provided on a side wall of said tuner unit housing,
• a tuner connecting terminal which is provided on said side wall having said tuner power source terminal, and
• wherein said mixer circuit and said oscillation circuit are disposed in said tuner unit metal housing, and said tuner unit is selected from a plurality of such tuner units which are of different kinds but which have a common design for said connection portion,
• a demodulation unit which includes
• a demodulation unit metal housing which has a connection portion,
• a demodulation input terminal for receiving said intermediate frequency signal of said tuner output terminal,
• a demodulation circuit which is connected for receiving an intermediate frequency signal of said demodulation input terminal, and which is disposed in said demodulation unit metal housing, and
• a demodulation output terminal for outputting a signal of said demodulation circuit,
• wherein said demodulation unit is selected from a plurality of such demodulation units which are of different kinds but which have a common design for said connection portion,
• connecting means connecting an outside wall of said tuner unit metal housing to an outside wall of said demodulation unit metal housing by attaching said connection portion of said tuner unit metal housing to said connection portion of said demodulation unit metal housing, whereby said tuner unit metal housing and said demodulation unit metal housing are connected together to form a unitary body, and
• a connector which electrically connects said tuner unit to said demodulation unit when said tuner unit is mechanically connected to said demodulation unit, and connector of said tuner unit is electrically connected to said tuner connecting terminal.

A radio frequency apparatus comprising:

• a tuner unit which includes
• a tuner unit metal housing which has a connection portion,
• a tuner input terminal for receiving a radio frequency signal,
• a mixer circuit which is connected for receiving a radio frequency signal of said tuner input terminal,
• an oscillation circuit which outputs a signal having a designated frequency based on a receiving channel to said mixer circuit, and
• a tuner output terminal for outputting an intermediated frequency signal of said mixer circuit,
• wherein said mixer circuit and said oscillation circuit are disposed in said tuner unit metal housing, and said tuner unit is selected from a plurality of such tuner units which are of different kinds but which have a common design for said connection portion,
• a demodulation unit which includes
• a demodulation unit metal housing which has a connection portion,
• a demodulation input terminal for receiving said intermediate frequency signal of said tuner output terminal,
• a demodulation circuit which is connected for receiving an intermediate frequency signal of said demodulation input terminal, and which is disposed in said demodulation unit metal housing,
• a demodulation output terminal for outputting a signal of said demodulation circuit,
• a demodulation power source terminal which is provided on a side wall of said demodulation unit housing, and
• a demodulation connecting terminal which is provided on said side wall having said demodulation power source terminal,
• wherein said demodulation unit is selected from a plurality of such demodulation units which are of different kinds but which have a common design for said connection portion,
• connecting means connecting an outside wall of said tuner unit metal housing to an outside wall of said demodulation unit metal housing by attaching said connection portion of said tuner unit metal housing to said connection portion of said demodulation unit metal housing, whereby said tuner unit metal housing and said demodulation unit metal housing are connected together to form a unitary body, and
• a connector which electrically connects said tuner unit to said demodulation unit when said tuner unit is mechanically connected to said demodulation unit, and said connector of said demodulation unit is electrically connected to said demodulation connecting terminal.

A radio frequency apparatus comprising:

• a tuner unit metal housing which has a connection portion,
• a tuner input terminal for receiving a radio frequency signal,
• a mixer circuit which is connected for receiving a radio frequency signal of said tuner input terminal,
• an oscillation circuit which outputs a signal having a designated frequency based on a receiving channel to said mixer circuit, and which is controlled by a predetermined control voltage based on a receiving channel, and
• a tuner output terminal for outputting an intermediate frequency signal of said mixer circuit,
• wherein said mixer circuit and said oscillation circuit are disposed in said tuner unit metal housing, and said tuner unit is selected from a plurality of such tuner units which are of different kinds but which have a common design for said connection portion,
• a demodulation unit which includes
• a demodulation unit metal housing which has a connection portion,
• a demodulation input terminal for receiving said intermediate frequency signal of said tuner output terminal,
• a demodulation circuit which is connected for receiving an intermediate frequency signal of said demodulation input terminal, and which is disposed in said demodulation unit metal housing, and
• a demodulation output terminal for outputting a signal of said demodulation circuit,
• wherein said demodulation unit is selected from a plurality of such demodulation units which are of different kinds but which have a common design for said connection portion,
• connecting means connecting an outside wall of said tuner unit metal housing to an outside wall of said demodulation unit metal housing by attaching said connection portion of said tuner unit metal housing to said connection portion of said demodulation unit metal housing, whereby said tuner unit metal housing and said demodulation unit metal housing are connected together to form a unitary body, and
• a connector which electrically connects between said tuner unit and said demodulation unit when said tuner unit is mechanically connected to said demodulation unit.

A radio frequency apparatus comprising:

• a tuner unit which includes
• a tuner unit metal housing,
• a tuner input terminal for receiving a radio frequency signal,
• a mixer circuit which is connected for receiving a radio frequency signal of said tuner input terminal,
• an oscillation circuit which outputs a signal having a designated frequency based on a receiving channel to said mixer circuit, and
• a tuner output terminal for outputting an intermediate frequency signal of said mixer circuit,
• said mixer circuit and said oscillation circuit being disposed in said tuner unit metal housing,
• a demodulation unit which includes
• a demodulation unit metal housing,
• a demodulation input terminal for receiving said intermediate frequency signal of said tuner output terminal,
• a demodulation circuit which is connected for receiving an intermediate frequency signal of said demodulation input terminal, and which is disposed in said demodulation unit metal housing, and
• a demodulation output terminal for outputting a signal of said demodulation circuit, and
• connecting means for attaching said tuner unit metal housing and said demodulation unit metal housing at respective outside walls thereof,
• a connector which electrically connects between said tuner unit and said demodulation unit when said tuner unit is mechanically connected to said demodulation unit, and
• selection means which selectively feed a signal to said connector of said demodulation unit so as to meet said tuner unit having a frequency synthesizer type or a voltage synthesizer type.

A radio frequency apparatus comprising:

• a tuner unit which includes
• a tuner unit metal housing which has a connection portion,
• a tuner input terminal for receiving a radio frequency signal,
• a mixer circuit which is connected for receiving a radio frequency signal of said tuner input terminal,
• an oscillation circuit which outputs a signal having a designated frequency based on a receiving channel to said mixer circuit, and
• a tuner output terminal for outputting an intermediate frequency signal of said mixer circuit,
• wherein said mixer circuit and said oscillation circuit are disposed in said tuner unit metal housing, and said tuner unit is selected from a plurality of such tuner units which are of different kinds but which have a common design for said connection portion,
• a demodulation unit which includes
• a demodulation unit metal housing which has a connection portion,
• a demodulation input terminal for receiving said intermediate frequency signal of said tuner output terminal,
• a demodulation circuit which is connected for receiving an intermediate frequency signal of said demodulation input terminal, and which is disposed in said demodulation unit metal housing, and
• a demodulation output terminal for outputting a signal of said demodulation circuit,
• wherein said demodulation unit is selected from a plurality of such demodulation units which are of different kinds but which have a common design for said connection portion,
• connecting means connecting an outside wall of said tuner unit metal housing to an outside wall of said demodulation unit metal housing by attaching said connection portion of said tuner unit metal housing to said connection portion of said demodulation unit metal housing, whereby said tuner unit metal housing and said demodulation unit metal housing are connected together to form a unitary body,
• a connector which electrically connects between said tuner unit and said demodulation unit when said tuner unit is mechanically connected to said demodulation unit, and
• at least one L-type connector which has at least two connecting pins arranged to project in two directions, and which is provided to be connected to said connector of said tuner unit or/and said demodulation unit.