Linear high frequency variable gain amplifier
US5949286A · kind A · utility
39Cited by
0References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1997 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Sep 26, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G1/0023
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A linear, high frequency, variable gain amplifier is disclosed. The amplifier includes a differential amplifier transistor pair for providing a gain controlled output signal in response to an input signal. Diode pairs connected between the emitters of the transistors, in conjunction with transistor gain control circuitry, provide for gain control of the output signal. A dummy amplifier connected to the differential amplifier transistor pair cancels the capacitance effects created by the diode pair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.