Direct conversion receiver employing subharmonic frequency...

Details Direct conversion receiver employing subharmonic frequency... Direct conversion receiver employing subharmonic frequency...

2006-12-12

2006-12-12

Urban, Edward F. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S304000, C455S333000

Reexamination Certificate

active

07149493

ABSTRACT:
A direct conversion receiver for receiving a first input signal and directly downconverting it to baseband frequencies. The receiver includes a frequency translator which is responsive to a phase-split input signal having 2n components, wherein n is an integer greater than 1. The phase-split signal has a period T which is about n times the period of the first input. The frequency translator alternates, at a rate of about 2n/T, between switching the first input signal to a first output, and switching the first signal to a second output. A preprocessor is available to improve the switching characteristics of the phase-split input signal.

REFERENCES:
patent: 5373533 (1994-12-01), Hayashihara et al.
patent: 5574755 (1996-11-01), Persico
patent: 5943370 (1999-08-01), Smith
patent: 6236690 (2001-05-01), Mimura et al.
patent: 6393266 (2002-05-01), Molnar
patent: 6587678 (2003-07-01), Molnar et al.
patent: 6654595 (2003-11-01), Dexter
patent: 6731923 (2004-05-01), Atkinson
patent: WO 96/38924 (1996-12-01), None
Ian Doyle, “A Simplified Subharmonic I/Q Modulator”,Applied Microwave & Wireless, Oct. 1998.
Takafumi Yamaji et al., “An I/Q Active Balanced Harmonic mixer with IM2 Cancelers and a 45° Phase Shifter”,IEEE Journal of Solid-State Circuits, vol. 33, No. 12, Dec. 1998.

Affiliated with

Also associated with

Rating

Direct conversion receiver employing subharmonic frequency... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Direct conversion receiver employing subharmonic frequency..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct conversion receiver employing subharmonic frequency... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3708734