Patent ID: 6150894
Filing Date: 2000-11-21
Classification: H03L

Abstract:
An oscillator having minimal fluctuation of frequency and amplitude from variation in temperature, comprising:an amplifier wherein the frequency and amplitude of an output signal of said amplifier fluctuates with temperature to a first extent;a compensation-resistance means connected within said amplifier to cause the amplitude, and frequency of said output signal to fluctuate with temperature to a second extent that is opposite to the first extent to compensate said fluctuation to the first extent;a first impedance connected between an output of said amplifier and a first input of said amplifier;a second impedance connected between the first input of said amplifier and a second input of said amplifier;a third impedance connected between the output of said amplifier and the second input of said amplifier; anda parasitic impedance present between the output and the second input of said amplifier herein said input is comprising interconnections of said oscillator to external circuitry and an output impedance of the amplifierwherein the first, second, and third impedances determine the frequency of said oscillator and said third impedance has a high quality factor and a low temperature coefficient to prevent fluctuation of said frequency and amplitude, and wherein said second impedance is much larger than said first impedance which is much larger than said parasitic impedance to minimize temperature effects on frequency of said parasitic impedance.