Oscillator having controllable bias modes and power consumption

Details Oscillator having controllable bias modes and power consumption Oscillator having controllable bias modes and power consumption

2006-11-08

2011-10-11

Ramakrishnaiah, Melur (Department: 2614)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S265000, C455S076000

Reexamination Certificate

active

08036619

ABSTRACT:
Disclosed is an oscillator circuit (10) for use in a local oscillator of an RF communications device (100) that communicates over an RF channel. The oscillator circuit includes an oscillator transistor coupled to a power supply voltage (Vcc) through a buffer transistor, and a biasing network having bias voltage outputs coupled to a control input of the oscillator transistor and to a control input of the buffer transistor. In one embodiment the bias voltage network is coupled to Vcc, while in another embodiment the bias voltage network is coupled to a separate voltage (Vbias). Circuitry is provided for setting a magnitude of Vcc and/or Vbias as a function of at least one of RF channel conditions, such as channels conditions determined from a calculation of the (SNR), or an operational mode of the RF communications device.

REFERENCES:
patent: 5175884 (1992-12-01), Suarez
patent: 5446417 (1995-08-01), Korhonen et al.
patent: 5471652 (1995-11-01), Hulkko
patent: 5642378 (1997-06-01), Denheyer et al.
patent: 5903832 (1999-05-01), Seppanen et al.
patent: 5926071 (1999-07-01), Kukkonen
patent: 5986514 (1999-11-01), Salvi et al.
patent: 6057739 (2000-05-01), Crowley et al.
patent: 6078819 (2000-06-01), Ciccone et al.
patent: 6157821 (2000-12-01), Boesch et al.
patent: 6188287 (2001-02-01), Avanic et al.
patent: 6265947 (2001-07-01), Klemmer et al.
patent: 6289208 (2001-09-01), Hareyama
patent: 6374092 (2002-04-01), Leizerovich et al.
patent: 6535499 (2003-03-01), Futamura et al.
patent: 2001/0029172 (2001-10-01), Lee et al.
patent: 0854566 (1998-07-01), None
patent: 11274951 (1999-10-01), None
patent: WO-00/03490 (2000-01-01), None
European Search Report dated Aug. 6, 2003.
“Noise Analysis of a VCO with Automatic Amplitude Control”, Mihai A. Margarit et al., IEEE 1999 Custom Integrated Circuits Conference, pp. 381-384.
“A Low-Noise, Low-Power VCO with Automatic Amplitude Control for Wireless Applications”, Mihai A. Margarit, et al., IEEE Journal of Solid-State Circuits, vol. 14, No. 6, Jun. 1999, pp. 761-771.
“8 GHZ Low Noise Bias Tuned VCO”, N. E. Znojkiewicz, IEEE MTT-S Digest 1984, pp. 489-491.
Zannoth, M., et al., “A Fully Integrated VCO at 2 GHz”, Feb. 6, 1998, 2 pgs., ISSCC98, Session 14, Analog Techniques, Paper FR 14.6.

Affiliated with

Also associated with

Rating

Oscillator having controllable bias modes and power consumption does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oscillator having controllable bias modes and power consumption, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oscillator having controllable bias modes and power consumption will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4258827