System for producing an oscillating jamming signal utilizing a phase-locked loop
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United States of America Patent
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Nov 22, 1994
Issued Date -
N/A
app pub date -
Apr 20, 1993
filing date -
Nov 8, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for producing an oscillating signal includes a phase-locked loop including a control voltage producing circuit. The control voltage producing circuit is provided for producing a plurality of predetermined control voltages, with each of the predetermined control voltages corresponding to a desired frequency. A plurality of memories are provided in the phase-locked loop for storing the predetermined control voltages. A control device is connected to the plurality of memories for storing the predetermined control voltages in the memories in a state where the phase-locked loop is closed, and for deriving at least one of the predetermined control voltages stored in the memories in a state where the phase-locked loop is opened. A voltage-control oscillator is provided in the phase-locked loop to be operated by the predetermined control voltage derived from one of the memories for producing the oscillating signal having a desired frequency dependent upon the desired voltage.
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