Linear voltage-controlled oscillator using fixed capacitors in lieu of varactors
US5469119A · kind A · utility
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4References
10Claims
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Assignee
Inventor
Key dates
| Filing date | Jul 14, 1993 |
| Grant date | Nov 21, 1995 |
| Priority date | — |
| Expiry date | Jul 14, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/0092
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The frequency of a resonant circuit in the emitter path of an output transistor is caused to vary linearly with control voltage. The control voltage is applied to a circuit that constrains the ac current through the resonant circuit to be supplied through the emitters of a two-transistor current steering circuit. The sum of the two transistor's dc emitter currents is constant while the dc current through one of the two transistors' emitters varies as the square root of the control voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.