Transmitter-receiver system for variable-rate digital data trans

Details Transmitter-receiver system for variable-rate digital data trans Transmitter-receiver system for variable-rate digital data trans

1982-08-23

1984-11-06

Orsino, Jr., Joseph A.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455617, 375102, H04B 1200

Patent

active

044816766

ABSTRACT:
In a data-transmission system designed for operation over a very broad temperature range and having a very large dynamic range, the receiver is of the type providing an alternating-current connection between the transimpedance circuit assembly and two comparator circuits for processing a signal which is coded at three levels. A threshold-generating circuit permits automatic switching of the thresholds among a plurality of predetermined discrete values as a function of the variation in amplitude of the signal. A circuit for inhibiting overoscillations is provided prior to transcoding. The transmitter delivers the information in the form of an internal code such as a PBP code having a constant direct-current component, and with refreshment. A delay circuit prevents overlapping of the code and refreshment pulses.

REFERENCES:
patent: 3509279 (1970-04-01), Martin
patent: 4027152 (1977-05-01), Brown et al.
patent: 4236256 (1980-11-01), Brackett et al.
patent: 4337457 (1982-06-01), Tache

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