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:
Dec. 13, 1994
Filed:
Sep. 10, 1992
Arthur H Van Roermund, Eindhoven, NL;
Johan H Hendrickx, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
An impedance transformation circuit for transforming a two-pole electrical impedance (Z) includes a first controllable current source for producing a current (I.sub.1) flowing through the impedance during operation. An operational amplifier is coupled to the first current source for providing a control signal (V.sub.0) corresponding to the impedance current (I.sub.1). A second controllable current source is coupled to the operational amplifier for providing at an input terminal of the circuit a further current (I.sub.2) proportional to the impedance current (I.sub.1) as a function of the control signal (V.sub.0). As a result of using a first and second controllable current source and applying the control signal delivered by the operational amplifier to the control inputs of the two current sources, an impedance transformation is obtained which is dependent on similar parameter ratios. The circuit is suitable for use as an integrated semiconductor circuit.