Frequency converter

Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

455239, 455241, 455253, 455311, H04B 126

Patent

active

048500380

ABSTRACT:
A frequency converter suitable for a multi-channel broadcast signals receiver is provided. The frequency converter includes a pre-amplifier with an AGC control terminal, first and second local oscillators, a first mixer for converting a first-RF frequency of the broadcast signal to a second-RF frequency using a first oscillation signal output from the first local oscillator, a second-RF signal amplifier with an AGC control terminal for amplifying the second-RF signal, a second mixer for converting the second-RF frequency of the second-RF signal output from the second-RF signal amplifier to a third-RF frequency using a second local oscillation signal output from the second local oscillator, and an AGC circuit for feeding back to the pre-amplifier and the second-RF signal amplifier the AGC signal which is obtained from the third-RF frequency signal as a conversion output from the second mixer for simultaneously controlling the gains of both the preamplifier and the second-RF signal amplifier.

REFERENCES:
patent: 1905946 (1933-04-01), Mathieu et al.
patent: 3454721 (1969-07-01), Wolff
patent: 4222118 (1980-09-01), Dickinson et al.
patent: 4353132 (1982-10-01), Saitoh et al.
patent: 4455681 (1984-06-01), Wile
patent: 4509207 (1985-04-01), Tong et al.
patent: 4545072 (1985-10-01), Skutta et al.
patent: 4590613 (1986-05-01), Tannery, IV
patent: 4704738 (1987-11-01), Graziadei et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Frequency converter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Frequency converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency converter will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-177878

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.