Multimode noise generator using digital FM

Details Multimode noise generator using digital FM Multimode noise generator using digital FM

1986-02-14

1987-02-17

Grimm, Siegfried H.

Oscillators

Electrical noise or random wave generator

455 1, H03B 2900

Patent

active

046442995

ABSTRACT:
A pseudorandom noise generator which operates in different modes is disclosed. The pseudorandom noise generator (10) includes circuitry (11,13) for providing a digital signal having a pseudorandom sequence at a selected clock rate; a modulation control circuit (15, 17, 20, 23) for selectively providing a modulation control signal that corresponds to either a non-filtered or filtered version of the digital signal, and for controlling the mode of operation of the noise generator; a modulation circuit (27, 29, 31, 33) responsive to the modulation control signal for providing a modulation signal; and a voltage controlled oscillator (VCO) (35) responsive to the modulation signal for providing a VCO output having a relatively constant output spectrum and high spectral containment for each mode of operation pursuant to control by the modulation control circuit and the modulation circuit.

REFERENCES:
patent: 4342119 (1982-07-01), Seidl
patent: 4396894 (1983-08-01), Willmore
patent: 4507796 (1985-03-01), Stumfall

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