Title: Multiple de-Q-ing circuit for a moving target indicator radar system

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Claims: What is claimed is:

1. A system for reducing time and amplitude jitter in a stagger mode radar modulator comprising:

a. a plurality of capacitors coupled in parallel and means for charging the plurality of capacitors;

b. a plurality of trigger means, each of said plurality of trigger means operably coupled to the output of the plurality of capacitors and to a reference voltage, the reference voltage for each of the plurality of trigger means being of a different magnitude, whereby an output signal for each of said plurality of trigger means is produced only when the output of the plurality of capacitors exceeds the magnitude of the reference voltage;

c. a corresponding plurality of electrical gates operably coupled to the plurality of trigger means;

d. means synchronized with the stagger mode operation of said modulator for sequentially enabling said gates to open sequentially the plurality of trigger means; and

e. means operably coupled to the outputs of said plurality of trigger means for preventing charging of the plurality of capacitors above a preselected level.

2. The system of claim 1 wherein each of said plurality of trigger means comprises a Schmidt trigger.

3. The system of claim 1 wherein each of said corresponding plurality of gates comprise a normally nonconductive transistor.

4. The system of claim 1 wherein said means for sequentially enabling said corresponding plurality of gates comprises a plurality of registers clocked responsive to reset trigger signals and to stagger modulator trigger signals.

5. The system of claim 1 wherein said means for preventing charging comprises a resistance connected to said capacitance by the operation of a switch controlled transformer.

Other info:

Inventors: Berry, Johnny L. (Plano, TX, US)

Application Number: 421298
Filing Date: 1973-12-03
Publication_date: 1976-05-04
Assignee: Texas Instruments Incorporated (Dallas, TX)
Primary Class(es): 342/175 327/231, 327/306
Other Classes:
US Patent Ref:

3119968	Jan, 1964	Schonberg	328/67.
3139585	Jun, 1964	Ross et al.	328/67.
3363184	Jan, 1968	Smith	328/67.
3716798	Feb, 1973	O'Loughlin	328/67.

Other Refs:
Primary Examiner: Zazworsky, John
Assistant Examiner:
Attorney: Levine; Harold, Grossman; Rene' E., Bandy; Alva H.