Automatic level control

Details Automatic level control Automatic level control

2011-08-23

2011-08-23

Choe, Henry K (Department: 2817)

Amplifiers

Signal feedback

Variable impedance in feedback path varied by separate...

C330S260000

Reexamination Certificate

active

08004354

ABSTRACT:
Some embodiments regard a circuit comprising: a high voltage transistor providing a resistance; an amplifier configured to receive a current and to convert the current to a first voltage that is used in a loop creating the current; and an automatic level control circuit that, based on an AC amplitude of the first voltage, adjusts a second voltage at a gate of the high voltage transistor and thereby adjusts the resistance and the first voltage; wherein the automatic level control circuit is configured to adjust the first voltage toward the first reference voltage if the first voltage differs from a first reference voltage.

REFERENCES:
patent: 4070632 (1978-01-01), Tuttle
patent: 7205845 (2007-04-01), Harms et al.
patent: 7245179 (2007-07-01), Chang
patent: 7352242 (2008-04-01), Hughes
Sharma, Ajit, “CMOS Systems and Circuits for Sub-Degree Per Hour MEMS Gyroscopes”,A Thesis Presented to the Academic Faculty by Ajit Sharma, In Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the School of Electrical and Computer Engineering, Georgia Institute of Tehcnology, Dec. 2007, 181 pages.

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