Zero IF receivers
US5697093A · kind A · utility
6Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1995 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Jul 24, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3052
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An automatic gain control strategy for zero IF receivers in which the gain of low pass filters (20,22) is altered whilst keeping their bandwidths substantially constant. The low pass filters (20,22) are implemented as gyrator filters, each of which comprise at least one pair of transconductors, the ratio of the transconductances of which are adjustable in such a manner as to maintain the product of their transconductances constant. An electronic signal for adjusting the ratio of the transconductances is derived from an estimate of the instantaneous signal amplitude of the received signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.