Direct conversion receiving circuit and direct conversion receiver
US6073000A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1996 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Jul 2, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/30
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention provides a superheterodyne receiver by which undesired radiations are minimized. The superheterodyne receiver includes a voltage-controlled oscillator for forming an oscillation signal of a frequency equal to n times a carrier frequency of an object FM signal, and a frequency divider for dividing the frequency of the oscillation signal to the carrier frequency. The superheterodyne receiver further includes a pair of first mixers for frequency converting the object received signal into a pair of first intermediate-frequency signals using signals from the frequency divider as a first local oscillation signal, and a pair of second mixers for converting the first intermediate-frequency signals into a second intermediate-frequency signal with the second local oscillation signals. The superheterodyne receiver further includes a demodulator for demodulating the second intermediate-frequency signal into an original signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.