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US H2,069 H1Granted
Signal processor
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsJames L. Rieger, Paul H. Woodworth
Life of this patent
Estimating the term…
Abstract
A signal processor circuit has a phase-locked loop with a low-pass filter for removing phase-modulation components from a clock signal. The processor circuit has an isolated power supply for removing amplitude-modulation components from the same clock signal.
Claims7
A signal processor circuit for producing a clock signal for encrypted telemetry by using an existing clock having an incoming clock operating frequency, the circuit comprising:
- an input of unregulated clock pulses;
- a phase locked loop having a feedback loop connected to said clock signal input;
- a low pass filter in said feedback loop having a frequency of one-tenth the operating frequency;
- an isolated power supply independent of said clock signal and connected to said phase locked loop for supplying power therefor.
1 more element
A signal processor for removing amplitude- and phase-modulation components from a clock signal, comprising:
- an isolated power supply independent of said clock signal
- a phase comparator connected to said isolated power supply;
- a low-pass filter connected to said phase comparator and effectively connected to said isolated power supply;
- and
- voltage-controlled oscillator connected to said low-pass filter, to said phase comparator and to said isolated power supply;
- and
- at least one buffer effectively connected to said voltage-controlled oscillator and to said isolated power supply.
4 more elements
Dependencies are inferred from the claim text.