Claims
- 1. An automatic gain control (AGC) system having an input signal and an output signal having a desired range, comprising:
- means for varying the amplitude of said input signal to generate said output signal; and
- means for coupling said output signal to said means for varying, comprising:
- means for developing a direct current signal proportional to the amplitude of said output signal;
- means for comparing said direct current signal with said predetermined output range;
- a switched capacitor integrator responsive to said direct current signal, comprising:
- means for responding with a first or second time constant; and
- means for switching from said first time constant to said second time constant when said output signal is substantially within said predetermined output range, and switching from said second time constant to said first time constant when said output signal is not substantially within said predetermined output range; and
- means for coupling the output of said switched capacitor integrator to said means for varying, whereby said means for varying is controlled.
- 2. The automatic gain control (AGC) system of claim 1, wherein said first time constant is short with respect to said second time constant.
- 3. The automatic gain control (AGC) system of claim 2, wherein said second time constant is long with respect to said first time constant.
Government Interests
This invention was made with Government support under Contract No. N00019-87-C-0290, awarded by the Department of the Navy. The Government has certain rights in this invention.
Foreign Referenced Citations (1)
Number |
Date |
Country |
62-144413 |
Jun 1987 |
JPX |