Apparatus and Method for Clock Frequency Estimation With Least Squares Method

Abstract: an apparatus includes a clock signal input, a sampling circuit, and an estimation circuit. the clock signal input receives n time measurements. a time measurement denotes a respective portion of a given cycle of a clock signal. the sampling circuit is to generate a first sampled window from the clock signal input. the first sampled window includes an accumulation of the n time measurements. the sampling circuit is to generate a second sampled window from the clock signal input including an accumulation of a plurality of products. the estimation circuit is to estimate the frequency or period of the clock signal based upon the first sampled window and the second sampled window.

Inventor(s): Gary Qu Jin, Kamran Rahbar

CPC Classification: H03K21/10 (PULSE TECHNIQUE (measuring pulse characteristics ; modulating sinusoidal oscillations with pulses ; transmission of digital information ; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation ; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified ; coding, decoding or code conversion, in general ))

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