Circuit and method of controlling mixer linearity
US5886547A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1996 |
| Grant date | Mar 23, 1999 |
| Priority date | — |
| Expiry date | Dec 16, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/0025
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An integrated receiver circuit (10) has a first amplifier (12) coupled for receiving a radio frequency (RFIN) input signal. A mixer (16) has an RF input coupled to an output of the first amplifier, a local oscillator (LO) input coupled for receiving an LO signal, and an output for providing an intermediate frequency (IF) signal. A second amplifier (20) has an input coupled for receiving the IF signal, and an output for providing a receive signal strength indicator (RSSI) signal representative of an input power level of the receiver signal path. A feedback circuit (22-26 or 72, 78) is coupled between the first output of the second amplifier and a linearity control input of the mixer for controlling linearity of the mixer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.