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:
Oct. 09, 1984
Filed:
Sep. 02, 1982
Veikko R Saari, Spring Lake Heights, NJ (US);
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
A switched capacitor MOS high-pass filter (10) includes a blocking capacitor (C.sub.1) which accepts an input signal at one side (IN). A first electronic toggle switch (S.sub.1) connects the gate of a depletion-mode buffer transistor (T.sub.1) alternately to the other side of the blocking capacitor (C.sub.1) and to ground in response to a pair of non-overlapping switching pulse trains (.phi..sub.1), (.phi..sub.2). A depletion-mode transistor (T.sub.2) provides current to the buffer transistor (T.sub.1). One side of an output capacitor (C.sub.2) is connected to the source of the buffer transistor (T.sub.1). A second toggle switch (S.sub.2) connects the other side of the output capacitor (C.sub.2) alternately to an output terminal (OUT) and to ground. Also disclosed is a filter (14) which includes a correction network (18) to eliminate from the output signal the effect of a feed-through error voltage generated by the action of the first switch (S.sub.1).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile