Oscillator circuit for receiving a wide frequency band signal
US5486796A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1994 |
| Grant date | Jan 23, 1996 |
| Priority date | — |
| Expiry date | Dec 8, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D7/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An oscillator provided with an oscillation circuit provided with two oscillation transistors comprising a differential pair and a resonance circuit connected in common to the bases of the oscillation transistors. The bases of the oscillation transistors are short-circuited by a coil, a center tap coil is connected in parallel to the resonance circuit, and variable capacitive diodes in the resonance circuit are driven by a coil connected to a mixing circuit. Due to this, it is possible to prevent the occurrence of low frequency noise, possible to realize a completely balanced operation, possible to avoid the oscillation carrier flowing into the power source and ground, and possible to reduce the noise in a television picture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.