Temperature compensated R-C oscillator

Details Temperature compensated R-C oscillator Temperature compensated R-C oscillator

2007-06-05

2007-06-05

Pascal, Robert (Department: 2817)

Oscillators

Frequency stabilization

Temperature or current responsive means in circuit

C331S11300A, C331S143000

Reexamination Certificate

active

10538574

ABSTRACT:
An R-C oscillator (200) is configured to vary the two voltage levels that are used to control the oscillation, such that the variation in oscillation frequency with temperature is minimized. A first resistor (R1) is used to control one of the voltage levels, and a second resistor (R2) having a temperature coefficient that differs from the temperature coefficient of the first transistor is used to control the other voltage level. The first resistor (R1) also controls the current used to charge and discharge the capacitor (C) used to effect the oscillation. By the appropriate choice of resistance values, the variations of the control voltages and current are such that the time to charge and discharge the capacitor (C) between the control voltages remains substantially constant with temperature. Preferably the resistance values are selected to also compensate for temperature variations in the delay of the feedback loop.

REFERENCES:
patent: 6300843 (2001-10-01), Kodama
patent: 6356161 (2002-03-01), Nolan et al.
patent: 6888763 (2005-05-01), Guo

Affiliated with

Also associated with

Rating

Temperature compensated R-C oscillator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Temperature compensated R-C oscillator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature compensated R-C oscillator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3874060