Invention Grant
US07675378B2 Multiple status e-fuse based non-volatile voltage control oscillator configured for process variation compensation, an associated method and an associated design structure 失效
多状态电子熔丝基非易失性电压控制振荡器配置用于过程变化补偿,相关方法和相关设计结构

Multiple status e-fuse based non-volatile voltage control oscillator configured for process variation compensation, an associated method and an associated design structure
Abstract:
Disclosed are embodiments of a voltage controlled oscillator (VCO) capable of non-volatile self-correction to compensate for process variations and to ensure that the center frequency of the oscillator is maintained within a predetermined frequency range. This VCO incorporates a pair of varactors connected in parallel to an inductor-capacitor (LC) tank circuit for outputting a periodic signal having a frequency that is proportional to an input voltage. A control loop uses a programmable variable resistance e-fuse to set a compensation voltage to be applied to the pair of varactors. By adjusting the compensation voltage, the capacitance of the pair of varactors can be adjusted in order to selectively increase or decrease the frequency of the periodic signal in response to a set input voltage and, thereby to bring the frequency of that periodic signal into the predetermined frequency range. Also disclosed are embodiments of an associated design structure for such a VCO and an associated method for operating such a VCO.
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