Automatic gain control

Details Automatic gain control Automatic gain control

1974-09-12

1976-01-06

Mullins, James B.

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

330133, H03G 322

Patent

active

039315843

ABSTRACT:
An Automatic Gain Control responsive to an input analog signal having a significantly varying power level provides an output analog signal of substantially constant power level. An analog-to-digital converter samples the output analog signal and expresses the amplitude of the samples in digital words characterized by bits including a Most Significant Bit. The Automatic Gain Control is responsive to the digital characteristics of at least the Most Significant Bit of the digital words to amplify the output analog signal to the substantially constant power level. This permits amplification of the input signal to a level approaching the maximum level expressible by the digital words and significantly reduces the quantization noise of the converter by maximizing the number of digital words which are available to express the signal amplitude.

REFERENCES:
patent: 3525948 (1970-08-01), Sherer et al.

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