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:
Nov. 30, 1999
Filed:
Sep. 12, 1997
Hyung-Weon Park, Seoul, KR;
SamSung Electronics Co., Ltd., Kyungki-do, KR;
Abstract
A radio transmission/reception system using the same frequency includes a power control circuit which can prevent a sensitivity of the receiver from being lowered due to the carrier radiated from the transmitter, and finely control the power. The power control circuit includes first and second variable attenuators being respectively installed at an intermediate frequency stage and a local oscillator frequency stage, so as to finely control the power level of a next radio frequency stage. A CPU (central processing unit) controls amounts of attenuation of the first and second variable attenuators. Each of the first and second attenuators includes a first pin diode connected so as to be turned on in response to a signal level from the intermediate frequency stage and so as to generate a first current flowing toward an output of the attenuator, and a second pin diode connected so as to be turned on in response to a signal level from the central processing unit and so as to generate a second current flowing in an opposite direction of the first current.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile