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Addressable-port, daisy chain telemetry system with self-test capability

  • US 4,617,566 A
  • Filed: 06/21/1984
  • Issued: 10/14/1986
  • Est. Priority Date: 12/15/1983
  • Status: Expired due to Fees
First Claim
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1. A telemetry system for transferring pulsed input data signals in series from a daisy chain of input data ports to a receiver, said system comprisinga daisy chain of input data ports;

  • a clock signal generator for generating a pulsed clock signal having periodically alternating first and second states;

    a clock line connected to the input data ports for carrying the clock signal pulses from the clock signal generator to the input data ports for timing the operation of the data ports;

    a control signal generator for generating control signal pulses during the first-state intervals of the pulsed clock signal; and

    an input data line serially-connecting the input data ports to the control signal generator and to said receiver for carrying the control signal pulses from the control signal generator to the data ports and a serial block of data pulses from the respective input data ports to the receiver;

    wherein each input data port includes a data register for registering an input data signal related to that input data port and for serially transferring the input data signal pulses related to that input data port from the data register onto the input data line during the second-state intervals of the pulsed clock signal, means for demultiplexing data signal pulses and control signal pulses received over the input data line from other input data ports and the control signal generator, and means for multiplexing all of the input data signal pulses and control signal pulses onto the input data line in their respective clock signal state intervals for transmission to the receiver and other input data ports connected in series between that input data port and the receiver.

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