Transducer circuit coupled to a control unit through a cable
AssigneeSiemens Milltronics Process Instruments, Inc.
InventorGeorge Quinton Lyon
Life of this patent
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Abstract
The transducer circuit includes a transducer component, a drive circuit for the transducer component, a control port for coupling the drive circuit to a control unit and a modulator. The modulator has an input port for receiving a signal or data from another device. The modulator has an output which is coupled to an output stage in the drive circuit. The modulator operates to transmit data, received at the input port, through the drive circuit and the control port to a control unit.
Claims27
A transducer circuit coupled to a control unit via a cable, comprising:
- a transducer component;
- a control port for connecting to the cable;
- a data port;
- a modulator having an input port and an output port, said input port being coupled to said data port for receiving a data signal;
- and
- a drive circuit coupled to said transducer component, the drive circuit comprising:
- an input-output stage coupled to said control port, and
- an output stage coupled to the output port of said modulator for outputting a modulated signal to the control unit corresponding to said received data signal,
- wherein said modulator comprises a pulse amplitude modulator and converts said data signal into a pulse amplitude modulated signal for the control unit.
A transducer circuit coupled to a control unit via a cable, comprising:
- a transducer component;
- a control port for connecting to the cable;
- a data port;
- a modulator having an input port and an output port, said input port being coupled to said data port for receiving a data signal;
- and
- a drive circuit coupled to said transducer component, the drive circuit comprising:
- an input-output stage coupled to said control port, and
- an output stage coupled to the output port of said modulator for outputting a modulated signal to the control unit corresponding to said received data signal,
- wherein said modulator applies binary phase shift keying to the received data signal.
A transducer circuit coupled to a control unit via a cable, comprising:
- a transducer component;
- a control port for connecting to the cable;
- a data port;
- a modulator having an input port and an output port, said input port being coupled to said data port for receiving a data signal;
- and
- a drive circuit coupled to said transducer component, the drive circuit comprising:
- an input-output stage coupled to said control port, and
- an output stage coupled to the output port of said modulator for outputting a modulated signal to the control unit corresponding to said received data signal,
- wherein said modulator includes frequency division multiplexing to avoid interference between said modulated data signal and a transducer signal.
Dependencies are inferred from the claim text.