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. 18, 1997
Filed:
Dec. 22, 1994
Applicant:
Inventor:
Paul A Moore, Seaford, GB;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H04B / ;
U.S. Cl.
CPC ...
455266 ; 455307 ; 4552001 ; 455340 ; 327558 ;
Abstract
A radio receiver has a frequency down conversion stage including a first passive filter tuned to a lower frequency. An amplifier functioning as a voltage-to-current converter includes a resistor (60) which can be shunted by a second passive filter in response to actuation of symmetrically arranged switching devices. When the second passive filter shunts the resistor, the overall pass band is raised to a higher frequency. Additionally, the amplifier has a lower noise figure when the second passive filter shunts the transconductor.