Invention Grant
- Patent Title: Variable gain amplifier with stable frequency response
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Application No.: US15460750Application Date: 2017-03-16
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Publication No.: US09966917B2Publication Date: 2018-05-08
- Inventor: Ariel Leonardo Vera Villarroel , Subramaniam Shankar , Steffen O. Nielsen
- Applicant: INPHI CORPORATION
- Applicant Address: US CA Santa Clara
- Assignee: INPHI CORPORATION
- Current Assignee: INPHI CORPORATION
- Current Assignee Address: US CA Santa Clara
- Agency: Ogawa P.C.
- Agent Richard T. Ogawa
- Main IPC: H03G3/30
- IPC: H03G3/30 ; H03F3/19 ; H03F3/45

Abstract:
A variable gain amplifier having stabilized frequency response for widened gain control range. A resistor-capacitor compensation network is provided between two differential current input ports and corresponding emitter nodes of cross-coupled four transistors in the variable gain amplifier to desensitize the gain control voltages to the system noise and provide compensation to the VGA frequency response when the differential gain control voltage varies the gain setting, yielding a substantially stabilized frequency response over a −3 dB bandwidth ranging from 1 GHz to 60 GHz with a widened gain control range up to 12 dB without increasing power consumption.
Public/Granted literature
- US20170187343A1 METHOD FOR IMPROVING STABLE FREQUENCY RESPONSE OF VARIBLE GAIN AMPLIFIER Public/Granted day:2017-06-29
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