Frequency generator suitable for use as position-frequency transducer
US4241317A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1979 |
| Grant date | Dec 23, 1980 |
| Priority date | — |
| Expiry date | Feb 16, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0231
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The resistance-inductance element used to determine the frequency of the frequency generator in the prior art circuits is replaced by an inductance-capacitance combination. As in the prior art circuits the frequency determining circuit is connected between the output and the inverting input of an operational amplifier to whose direct input a reference voltage is applied. However in the present circuit an inductance is connected from the output to the inverting input of the operational amplifier and a capacitance-resistance circuit is connected in parallel with the inductance. A capacitance connects the inverting input of the operational amplifier to ground potential. Resistors connected from the inverting input to the positive voltage supply and to the output terminal from the inverting input and from the direct input are used to change the slope of the curve of frequency vs. inductance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.