Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Patent
1990-03-23
1993-01-12
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
455306, 455324, H04B 700, H04B 110
Patent
active
051797305
ABSTRACT:
A direct conversion receiver having a tri-phase architecture including three separate baseband signal channels. RF communications signals which are being tuned by the receiver are split into three equal and in-phase components which are mixed with three equal but substantially out-of-phase injection signals on frequency with the communications signal. The resulting baseband component signals are independently filtered and amplified on the three signal channels. The baseband components are then directed to a signal processing unit which corrects the baseband components for gain or phase mismatch errors between the signal channels based on the information carried by the three components and thereafter demodulates the signals in order to acquire the information carried by the RF communications signal. An automatic gain control system and a signal filtering system adapted for use with direct conversion receivers are also disclosed.
REFERENCES:
patent: 4517519 (1985-05-01), Mukaiyama
patent: 4570125 (1986-02-01), Gibson
patent: 4893316 (1990-01-01), Jane et al.
patent: 5052050 (1991-09-01), Collier et al.
Belzer Christine
Eisenzopf Reinhard J.
Hamann H. Fredrick
Horn John J.
Murrah M. Lee
LandOfFree
Selectivity system for a direct conversion receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Selectivity system for a direct conversion receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Selectivity system for a direct conversion receiver will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1226630