U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Compensation circuit for an electrical signal mixer

Patent 4163944 Issued on August 7, 1979. Estimated Expiration Date: Icon_subject December 22, 1996. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

2702209

3478268

3924186

Inventors

Assignee

Application

No. 05/753388 filed on 12/22/1976

US Classes:

375/309, Keying circuits455/331Crystal or electron tube diode

Examiners

Primary: Richardson, Robert L.
Assistant: Chin, Tommy P.

Attorney, Agent or Firm

International Classes

H04B 7/005 (20060101)
H03C 1/00 (20060101)
H03C 1/54 (20060101)

Abstract

The carrier suppression circuit of the present invention is utilized to minimize electrical imbalances within double-balanced mixers. The circuit operates upon a modulating signal, having at least two states so as to adjust the dwell time that the signal stays in a particular state to counteract the effects of electrical imbalance within the mixer. Minimization of the electrical imbalance provides a greater suppression of the carrier signal which, in turn, improves the quality of the signal both at the transmitter and at the receiver.

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