Patent ID: 8665029
Filing Date: 2014-03-04
Classification: G05F,H03K,H03L

Abstract:
1. An oscillator module, comprising: an oscillator circuit generating a clock signal based on a reference voltage and an input current; and a reference circuit coupled to the oscillator circuit and providing the reference voltage and the input current based on a voltage proportional to absolute temperature, wherein the reference voltage and the input current are proportional to absolute temperature, such that the clock signal is a temperature insensitive signal, wherein the reference circuit comprises: a reference voltage generation unit comprising an electric element having the voltage proportional to absolute temperature, and the reference voltage generation unit providing the reference voltage based on the voltage proportional to absolute temperature; and a reference current generation unit coupled to the reference voltage generation unit and providing a reference current to serve as the input current based on the voltage proportional to absolute temperature, wherein the reference voltage generation unit comprises: a first current generation unit comprising the electric element and providing a first current based on the voltage proportional to absolute temperature, wherein the first current is proportional to absolute temperature; and a voltage divider unit coupled to the first current generation unit, receiving the first current, and providing the reference voltage based on a divider ratio of the voltage divider unit and the first current.