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:
Jan. 02, 1996
Filed:
Oct. 25, 1994
John J Parkes, Jr, Boynton Beach, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A low-voltage IF amplifier (112) provides automatic gain control (AGC) of a source amplifier (104) supplying an IF input signal to the IF amplifier (112). The IF amplifier (112) includes cascaded amplifier stages (202) that include an amplifier element (344) having an input (122) for receiving a stage input signal, and an output (124) for generating an amplified stage output signal in response. The amplifier stages (202) also include a received signal strength detector (346), or RSSD, for generating a gain control current responsive to the stage input signal. The IF amplifier (112) also includes a current summer (206) for summing the gain control currents generated by the RSSDs (346) to produce a total gain control current, and a gain control element (204) that controls the gain of the source amplifier (104) in response to the total gain control current, such that signal levels within the source amplifier (104) are maintained within a linear operating range.