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Marine telephone radio

  • US 4,267,597 A
  • Filed: 07/05/1979
  • Issued: 05/12/1981
  • Est. Priority Date: 07/05/1979
  • Status: Expired due to Term
First Claim
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1. A communication device comprising:

  • (a) a plurality of operational controls, said controls including a data entry means for multiple channel number selections for incoming call monitoring, and operational status selecting means for selecting operational functions;

    (b) a multiplexer connected to the plurality of operations controls for producing in sequence signals indicative of operator selected channel numbers and operational functions;

    (c) a plurality of circuits including logic gates with first input terminals connected selectively to the multiplexer for receiving the electrical signals indicative of selected channel numbers and operational controls, second input terminals for receiving data loading signals, and output terminals;

    (d) an encoder selectively connected to the logic gates'"'"' outputs for encoding the output signals;

    (e) a microcomputer having input terminals connected to the encoder'"'"'s output terminals for receiving the coded output thereof, said microcomputer operative to produce;

    loading signals, transmitter inhibiting signals responsively to selected operational function signals, alternately signals indicative of selected channel numbers for receiver scanning, and operational signals, said microcomputer having output terminals including a portion thereof connected to the second input terminals of the logic gates for loading the microcomputer with the logic gates'"'"' information responsively to receipt of the microcomputer'"'"'s loading signals;

    (f) a plurality of shift registers connected to selected outputs of the microcomputer, said shift registers operatively responsive to data outputs of the microcomputer for producing display activating signals and, alternatively bit words during receive each bit word comprising a synthesizer frequency address, a synthesizer enable signal and a power output selection signal, and a bit word during transmission including a carrier frequency address for a selected channel frequency;

    (g) a display connected to the selected shift registers for displaying selected functional information;

    (h) a microphone for producing audio frequencies;

    (i) a frequency synthesizer selectively connected to the plurality of shift registers and microphone for producing frequencies responsively to the frequency synthesizer enable signals and frequency addresses of the bit words during receive, and a modulated signal by modulating the RF frequency of the frequency address and the audio frequency of the microphone during transmit; and

    (j) a transceiver including a receiver/transmitter inhibiting means, a receiver and a transmitter, said inhibiting means connected to the microcomputer and said receiver and transmitter connected to the frequency synthesizer, said receiver/transmitter inhibiter means responsively to the microcomputers'"'"' transmitter inhibiting signals to inhibit the transmitter during receive, said receiver operative to receive the RF frequencies for the selected channels from the frequency synthesizer during receive and to produce any audio frequency present, and said transmitter operative to transmit the modulated frequencies of the frequency synthesizer during transmit.

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