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:
Sep. 30, 2003
Filed:
Apr. 16, 2002
M. C. Ramesh, Dallas, TX (US);
Feng Ying, Plano, TX (US);
Haydar Bilhan, Dallas, TX (US);
Gary Lee, Plano, TX (US);
Yong Han, Plano, TX (US);
Ching-Yuh Tsay, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A programmable gain amplifier using metal-oxide-semiconductor (MOS) devices to approximate exponential gain characteristic with linear control signals is disclosed. According to one embodiment, the programmable gain amplifier ( ) may include a capacitive switching circuit ( ), a capacitive switching circuit ( ), and an operational amplifier ( ). Capacitive switching circuits ( and ) may receive an analog input voltage through sample switches ( and ). Capacitive switching circuit ( ) receives an output from operational amplifier ( ) through feedback switch ( ). The programmable gain amplifier ( ) may include a few additional unit capacitors which can allow larger gain ranges or more steps for a given range without a large increase in chip size.