The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 19, 1985
Filed:
Sep. 27, 1982
Winthrop S Pike, Princeton, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
A pair of voltage followers, having offsets which differ by a fraction of the threshold voltage of a diode, are coupled to respective sources of signal and load voltage to provide unequally offset ouput voltages. An amplifier, coupled to the voltage followers, provides an output current when the difference of the signal and load voltages is of a given sense and magnitude, the output current being substantially zero otherwise. The amplifier includes a transconductance control element for regulating the differential voltage-to-current conversion gain thereof and a current mirror for applying the output current to the load in a sense to reduce difference between the signal and load voltages thereby simulating a diode having independently controllable threshold voltage and forward conductance characteristics, having negligible reverse conduction, which provides a power gain with high stability and substantially no tendency toward oscillations and which may be constructed in integrated circuit form without need for special processing steps. In an exemplary application, the simulator includes plural amplifiers for controlling dead zones of an adaptive control signal filter of an audio signal expander.