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. 31, 1989
Filed:
Nov. 30, 1987
Adrianus Sempel, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A fitter comprising a first (R.sub.1) and a second (R.sub.2) resistor arranged in series between an input terminal (5) for receiving an input voltage (v.sub.i) and the input (2) of an amplifier. The amplifier (1) comprises a transistor (T.sub.1) whose base is coupled to the input (2), whose emitter is coupled to a first output (3) and via a current source (I.sub.1) to ground, and whose collector is coupled to a second output (4) and via a third resistor (R.sub.3) to the positive power-supply terminal. A first capacitor (C.sub.1) is arranged between the junction point (6) between the first resistor (R.sub.1) and the second resistor (R.sub.2) and the first output and a second capacitor (C.sub.2) is arranged between the input (2) and ground. A signal having a second-order low-pass characteristic is taken from the first output and a signal having a second-order high-pass characteristic is taken from the second output.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile