公开(公告)号：US08598948B1

公开(公告)日：2013-12-03

申请号：US13685336

申请日：2012-11-26

Applicant: Marvell International Ltd.

Inventor： Chun-Geik Tan ,  Randy Tsang ,  Yonghua Song

IPC: G05F1/10

CPC classification number: G05F3/24 ,  H03L1/022 ,  H03L7/099

Abstract: A system and method for voltage controlled oscillator (VCO) biasing in low voltage circuits including low resistance elements that are especially susceptible to noise. In one embodiment, a poly resistor and triode resistor is used to cancel or offset the effects that temperature variations have on the circuit. The triode resistor is powered by a voltage source that uses a pair of diodes coupled to a constant transconductance (gm) circuit to generate a reduced noise voltage that is independent of the power supply noise. The size of the triode resistor and poly resistors can be varied.

Abstract translation: 一种低压电路中压控振荡器（VCO）偏置的系统和方法，包括特别容易受噪声影响的低电阻元件。 在一个实施例中，使用多电阻和三极管电阻来消除或抵消温度变化对电路的影响。 三极管电阻由电压源供电，该电压源使用耦合到恒定跨导（gm）电路的一对二极管来产生独立于电源噪声的降低的噪声电压。 三极管电阻和多个电阻的大小可以变化。