Automatic Gain control system

An automatic gain control system, comprising:

• gain control means for providing an output signal by performing step mode operations on an input signal;
• comparing means for generating a digital output exhibiting different states indicating a relation between amplitude of said output signal and a window reference voltage range by concurrently making a comparison between said output signal and said window reference voltage range;
• malfunction preventing means receiving said digital output, for generating output pulses and for controlling pulse length and period of said output pulses in dependance upon said states of said digital output;
• and
• up/down counting and logic means for performing up and down counting operations controlling said step mode operations on the basis of said output pulses of said malfunction preventing means.

An automatic gain control system, comprising:

• gain control means for providing an output signal susceptible to the presence of impulse noise components exhibiting a first range of periods and a second range of periods exceeding said first range of periods in duration, and for performing step mode operations on an input signal to provide said output signal;
• comparing means for operating upon output signal and generating a digital output indicating relations between said output signal and a window reference range;
• means for generating a plurality of clock pulses at frequencies set on the basis of the relation between said output signal and window reference range;
• malfunction preventing means receiving said digital output, for generating output pulses characterized by periods exceeding said first range in dependence upon said digital output;
• and,
• counting means for performing counting operations controlling said step mode operations on the basis of said output pulses generated by said malfunction preventing means and at rates set by said clock pulses.

An automatic gain control system, comprising:

• gain control means for providing an output signal susceptible to the presence of impulse noise components exhibiting a first range of periods, for performing step mode operations on an input signal to provide said output signal;
• means operating upon and making a comparison of said output signal with a window reference range, for generating output pulses having periods exceeding said first range of periods while said output signal exhibits particular relations with said window reference range during said comparison;
• means for generating clock pulses at frequencies set on the basis of said relations of said output signal and window reference range;
• and
• counting means for performing counting operations controlling said set mode operations on the basis of said output pulses generated by said output pulse generating means and at rates set by said clock pulses.