Amplitude modulator having substantially zero modulation distortion
US4485359A · kind A · utility
4Cited by
2References
12Claims
0Family size
Inventor
Key dates
| Filing date | Mar 28, 1983 |
| Grant date | Nov 27, 1984 |
| Priority date | — |
| Expiry date | Mar 28, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D1/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An improved substantially "zero distortion" four quadrant modulator of the type including a pair of differential elements respectively coupled to the Y input port terminals of the modulator and exhibiting nonlinear amplitude transfer functions, includes the means for substantially linearizing the nonlinear transfer function. The means includes a pair of operational amplifiers, each having an input coupled to a respective terminal of the Y input port and an output coupled to the corresponding differential element so that the differential element is disposed in the feedback path of the operational amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.