Marvell Asia Pte., Ltd.

Minchao Zhou

Song Chen

Lei Luo

Jiancheng Zhang

Circuitry for determining temperature of an integrated circuit device includes, on the device, a ring oscillator and a bias current generator. The bias current generator is selectably operable in (i) a first mode having a first sensitivity to device temperature or (ii) a second mode having a second sensitivity to device temperature, to provide bias current for the ring oscillator. A controller operates the bias current generator in the first mode and records a frequency output of the ring oscillator, then operates the bias current generator in the second mode and records a frequency output of the ring oscillator, and determines the temperature of the integrated circuit device from a ratio of (a) the frequency output of the ring oscillator while the bias current generator operates in the first mode to (b) the frequency output of the ring oscillator while the bias current generator operates in the second mode.

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Shanghai, China

Minchao Zhou