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. 24, 1981
Filed:
Mar. 02, 1979
Noach Amitay, Tinton Falls, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
The present invention relates to a driver for a diode switch comprising a complementary arrangement of a first and a second type of transistor across a voltage source. The first type of transistor is coupled to receive only a-c fluctuations in the input signal and is arranged to be not saturated but at cut off at the beginning of each switching subframe and be turned on for a very short time in response to a predetermined a-c input transition. The second type of transistor is coupled to receive a-c and d-c input signal fluctuations and has a resistive element for limiting the forward-biased current through the diode switch when turned on. A resistive element across the emitter collector terminals of the first type of transistor maintains the appropriate back-biasing potential on the diode switch when both transistors are cut off.