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:
Oct. 02, 2012
Filed:
Oct. 21, 2010
Changming Wei, Shanghai, CN;
Yu Zhang, Shanghai, CN;
Lixin Jiang, Shanghai, CN;
Jinfu Chen, Shanghai, CN;
Jeffrey G. Barrow, Tucson, AZ (US);
ChangMing Wei, Shanghai, CN;
Yu Zhang, Shanghai, CN;
Lixin Jiang, Shanghai, CN;
JinFu Chen, Shanghai, CN;
Jeffrey G. Barrow, Tucson, AZ (US);
Integrated Device Technology, inc., San Jose, CA (US);
Abstract
A switch circuit is provided. The switch circuit may include a first transistor having a source terminal to accept an input signal, a drain terminal to provide an output signal, and a gate; a power supply providing a gate voltage. The switch circuit may also include a circuit to couple a switch signal to the gate, wherein the circuit turns the first transistor 'off' for all values of the input signal when the switch signal is 'low.' A programmable gain amplifier (PGA) is also provided. The PGA may include an input stage having an input node to couple an input signal, and an output node to provide a gate signal, at least a first gain stage including a resistor and a switch circuit as above. A differential gain amplifier may be included to provide an output signal from the gain signal.