Frequency conversion apparatus
US4677692A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1985 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | Jun 27, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/0084
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A frequency conversion apparatus for converting a high frequency signal into an intermediate frequency signal includes a mixer section for mixing a high frequency signal with a local oscillator signal so as to obtain an intermediate frequency signal, and an amplifier connected to the mixer section via a high frequency stopping circuit for supplying a constant direct current to the mixer section as a constant current source. A current flowing in the mixer section when the local oscillator signal is applied is kept substantially equal to a direct current flowing in the mixer section when no local oscillator signal is applied thereto. The amplifier is used for amplifying either the high frequency signal or the intermediate frequency signal, or both signals at the same time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.