Digital tuning device
US3943471A · kind A · utility
2Cited by
1References
9Claims
0Family size
Inventor
Key dates
| Filing date | Aug 2, 1974 |
| Grant date | Mar 9, 1976 |
| Priority date | — |
| Expiry date | Aug 2, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J5/04
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital tuning device for accurate selectable tuning of a resonant circuit. The inductive and capacitive elements of the resonant circuit are connected by a transformer device whose turns ratio is variable in accurate digital increments. Since the reflected reactance is related to the square of the turns ratio and since the resonant frequency varies as the inverse square root of the reactance, the resonant frequency of the circuit is directly related to the turns ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.