Method and apparatus for suppressing spurious third-order responses in transceivers
US5590411A · kind A · utility
18Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1995 |
| Grant date | Dec 31, 1996 |
| Priority date | — |
| Expiry date | Jan 10, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/109
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Apparatus and a method for inhibiting spurious responses in the receiver stage of a radio telephone are disclosed. A detector detects the transmission of an RF signal from the transceiver and sends a control signal indicative of such transmission to a linearity controller. The linearity controller is coupled to non-linear devices in the receiver stage of a transceiver and varies the linearity of the non-linear devices in accordance with the control signal. Preferably, the linearity is varied by increasing the bias current or voltage for the non-linear devices when the control signal indicates transmission of an RF signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.