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US 5,111,080 AGranted
Complementary signal transmission circuit with impedance matching circuitry
AssigneesHitachi, Ltd., Hitachi VLSI Engineering Corp.
InventorsMasao Mizukami, Yoichi Sato
Life of this patent
Estimating the term…
Abstract
A signal transmission circuit in which a signal is converted into two complementary signals which are outputted from a signal transmission circuit via series resistors. The amplitude of each of the complimentary signals is reduced by the series resistors and terminating resistors provided on a signal receiving side. The signal receiving side shifts the level of the signals which it inputs. The level shifted signals are amplified by a high-input impedance differential amplifying circuit.
Claims24
A signal transmission circuit comprising:
- a transmission-side output circuit for outputting complementary output signals therefrom in response to signals to be transmitted;
- resistor means connected in series to output terminals, respectively, of said output circuit;
- terminating resistors whose resistances are adapted to be matched with the characteristic impedances of transmission lines for transmitting the complementary output signals;
- and
- a receiving input circuit, having an input portion, a level shifting circuit connected to said input portion for level shifting an input signal, and a high-input impedance type differential amplifying circuit connected to said level shifting circuit, said receiving input circuit being used to receive the output signals transmitted from said output circuit.
2 more elements
A signal transmission circuit comprising:
- a plurality of transmission-side circuits and receiving-side circuits;
- and
- transmission lines provided in common to the respective circuits and provided, at both ends thereof, with terminating resistors whose resistances are matched with the characteristic impedances thereof;
- whereby one transmission-side circuit and one or more receiving-side circuits are selected to thereby transmit signals through said transmission lines, and the transmission-side circuit thus selected serves to deliver output signals via series resistors having resistance values larger than those of the terminating resistors to said selected one or more receiving circuits, wherein said one or more selected receiving circuits amplify the received output signals by a high-input impedance type differential amplifying circuit.
1 more element
A signal transmission system comprising:
- a transmission-side output circuit having output terminals for outputting complementary output signals derived from signals to be transmitted;
- resistor means coupled in series to said output terminals, respectively, of said output circuit;
- an input circuit having first and second input terminals for receiving the output signals transmitted from said output circuit, a high-input impedance differential amplifying circuit connected to said input terminals;
- a first terminating resistor coupled between said first input terminal of said input circuit and a power source voltage;
- and
- a second terminating resistor coupled between said second input terminal of said input circuit and said power source voltage, wherein said resistor means coupled in series to said output terminals respectively, have predetermined resistance values larger than those of said first or second terminating resistor.
3 more elements
A signal transmission circuit comprising:
- a transmission-side output circuit for outputting, over transmission lines, complementary output signals derived from signals to be transmitted;
- resistor means coupled in series to output terminals, respectively, of said output circuit;
- terminating resistors connected to said transmission lines for transmitting the complementary output signals having resistances which are matched with characteristic impedances of said transmission lines;
- and
- an input circuit having a high-input impedance differential amplifying circuit which receives output signals transmitted from said output circuit, wherein said resistor means coupled in series to output terminals have predetermined resistance values larger than those of said terminating resistors.
2 more elements
A signal transmission circuit, comprising:
- an integrated transmission-side output circuit for outputting complementary signals therefrom in response to signals to be transmitted;
- transmission lines connected to said output circuit;
- and
- an integrated receiving input circuit having an input portion for receiving complementary signals outputted by said output circuit over said transmission lines, a level shifting circuit connected to said input portion for shifting a level of complementary signals input by said input portion, an amplifying circuit connected to said level shifting circuit for amplifying complementary signals output from said level shifting circuit whose voltage level has been shifted to a range which can be amplified by said amplifying circuit, wherein active components of said output circuit and said receiving input circuit are MOSFETs.
1 more element
A signal transmission circuit, comprising:
- a reference ground;
- a transmission-side output circuit for outputting complementary signals therefrom in response to signals to be transmitted;
- a receiving input circuit having an input portion, and an amplifying circuit connected to said input portion;
- transmission lines connected between said transmission side output circuit and said input portion of said receiving input circuit;
- and
- terminating resistor means connected between at least one of said transmission lines and a voltage source whose voltage is different from said reference ground.
3 more elements
Dependencies are inferred from the claim text.