Sine wave generator
US4542353A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1983 |
| Grant date | Sep 17, 1985 |
| Priority date | — |
| Expiry date | Dec 5, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/0066
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sine wave generator circuit for providing, as its output, a substantially perfect sine wave signal includes a multiplier responsive to first input and second input signals of varying magnitude for providing as its output the sine wave signal as a function of the two input signals. There is further included a first feedback circuit path connected between the output and one of the inputs of the multiplier which includes a resistance-capacitance network for providing a phase delayed representation of the output signal as the first of the input signals. The amount of phase delay is determined by the relative values of the resistance-capacitance network and determines the frequency of the sine wave output. Further included is a reference signal the magnitude of which will determine the magnitude of the sine wave output signal. The reference signal is applied to a second feedback circuit path connected between the multiplier output and the other one of its inputs. This second feedback path includes a bridge circuit, for providing an intermediate signal which is proportional to the absolute value of the sine wave output, and an integrating circuit which integrates the difference between…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.