Calibration oscillators for noise reduction systems

Details Calibration oscillators for noise reduction systems Calibration oscillators for noise reduction systems

1975-04-09

1977-01-04

Gensler, Paul L.

Wave transmission lines and networks

Amplitude compression and expansion systems

330109, 330141, 330145, 331 44, 331 59, 331135, 331183, H04B 164, H03B 500

Patent

active

040017320

ABSTRACT:
In a signal compressor wherein an amplified and smoothed control signal is employed to control a variable gain or variable impedance device, a switch is provided to connect a positive feedback loop across the control signal amplifier, thereby to place the compressor in an oscillator mode for providing an alignment or calibration signal of stable amplitude.

REFERENCES:
patent: 3012197 (1961-12-01), Peterson et al.
patent: 3324415 (1967-06-01), Sheffet
patent: 3500246 (1970-03-01), Werner
patent: 3806832 (1974-04-01), Channing et al.

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