Radio frequency zero if direct down converter

Details Radio frequency zero if direct down converter Radio frequency zero if direct down converter

1998-07-23

2000-11-14

Le, Thanh Cong

Telecommunications

Transmitter

Angle modulation

455111, 455 3, 375329, H04B 104

Patent

active

06148184&

ABSTRACT:
An RF direct down-conversion topology that is insensitive to leakage and device mismatching is presented. According to the system the RF signal is split into two arms with each arm having a mixer. Each mixer has two inputs namely a phase modulated local oscillator signal and the RF information signal. The phase modulated local oscillator signal between each arm differs by a 90 degrees phase shift. The output of the mixers is subtracted and the output of the subtractor is mixed with the phase modulation signal. The output of the third mixer represents the base band. A low pass filter then removes the unwanted signals.

REFERENCES:
patent: 4254503 (1981-03-01), Vance
patent: 4507617 (1985-03-01), Sasaki
patent: 5303417 (1994-04-01), Laws
patent: 5323425 (1994-06-01), Colamonico et al.
patent: 5584059 (1996-12-01), Turney et al.
patent: 5584068 (1996-12-01), Mohindra
patent: 5787362 (1998-08-01), Matero

Affiliated with

Also associated with

Rating

Radio frequency zero if direct down 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 Radio frequency zero if direct down converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio frequency zero if direct down converter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2074235