Mixer circuit with on-chip transformer

Details Mixer circuit with on-chip transformer Mixer circuit with on-chip transformer

2005-02-01

2005-02-01

Maung, Nay (Department: 2684)

Telecommunications

Receiver or analog modulated signal frequency converter

With wave collector

C455S326000

Reexamination Certificate

active

06850746

ABSTRACT:
An apparatus for modifying a radio frequency signal includes a mixer core, an input circuit and an interface circuit. The mixer core receives a first signal having a first frequency and a second signal having a second frequency, and outputs a third signal which is a function of the first and second signals. The input circuit sets a predetermined bias current, receives a radio frequency (RF) signal and inputs the RF signal into the mixer core. The interface circuit is interposed between the mixer core and the input circuit. The interface circuit receives the bias current and input it to the mixer core. In one embodiment, the input circuit includes a transistor and the interface circuit includes a transformer.

REFERENCES:
patent: 5323123 (1994-06-01), Philippe
patent: 6157822 (2000-12-01), Bastani et al.
patent: 6184739 (2001-02-01), Doyle
patent: 6275687 (2001-08-01), Lloyd
patent: 6308048 (2001-10-01), Gore et al.
patent: 6329865 (2001-12-01), Hageraats et al.
patent: 27 34 945 (1979-02-01), None
patent: 0 742 640 (1996-04-01), None
Article entitled “Digital Cellular Telecommunications System (Phase 2+); Radio Transmission and Reception (GSM 05.05)” by ETSI European Telecommunications Standards Institute, Version 5.2.0, Jul. 1996.
Curran, “RFICs: Dual-Band Cell Phones Emerge”,EDN, May 22, 1997.
Menezes, “Study: Dual Mode Will Explode”,Wireless Week, Jun. 30, 1997.
Article entitled “Track to Multi-band GSM”, GSM Global System for Mobile Communications, undated.
Data Sheet entitled “RF122 Power Amplifier Controller For Heterojunction Bipolar Transistor Power Amplifiers”, Rockwell Semiconductor Systems, Order No. W222, Oct. 13, 1997.
Data Sheet entitled “RF123 Translation Loop”, Rockwell Semiconductor Systems, Order No. W223, Sep. 12, 1996.
Data Sheet entitled “RF130 Power Amplifier for GSM Applications”, Rockwell Semiconductor Systems, Order No. W229, Dec. 3, 1997.
Data Sheet entitled “RF133 RF/IF Transceiver for GSM Applications”, Rockwell Semiconductor Systems, Order No. W261,Oct. 31, 1997.
Data Sheet entitled “RF230 GSM1800/PCT1900 Power Amplifier”, Rockwell Semiconductor Systems, Order No. W225, Jan. 14, 1998.
Razavi, “RF Microelectronics”, Prentice Hall Communications Engineering and Emerging Technologies Series, pp. 180-205, 1998.
Krauss et al., “Solid State Radio Engineering; 7: Mixers”, pp. 188-218, 1980.
Gray, et al., “Analysis and Design of Analog Integrated Circuits”, Third Edition, pp. 667-681, 1993.

Affiliated with

Also associated with

Rating

Mixer circuit with on-chip transformer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Mixer circuit with on-chip transformer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mixer circuit with on-chip transformer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3487310