Switched capacitor mixer/multiplier
US4789837A · kind A · utility
83Cited by
1References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1987 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Apr 22, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/006
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sequence of samples of a time varying signal is multiplied by respective, corresponding, multiplicands corresponding to values of a separate signal. The multiplicands are provided as ratios of capacitances switched into and out of a circuit between the input time varying voltage and an accumulating integrator. The arrangement is used to provide multiplication of a time varying signal by corresponding amplitudes of a sinusoid without requiring generation of a sinusoid. The arrangement is used for sampling, detecting signals utilizing a simulated local oscillator signal, and for generation of an arbitrary time varying function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.