Title :
An accurate analysis of a VCO voltage regulator
Author :
Hoh Young Yeo ; Hang eun Jeong
Author_Institution :
Dept. of Electron. Eng., Chonbuk Nat. Univ., Jeonju
Abstract :
A voltage regulator can be used to reduce the effect of the power-supply noise of the control voltage of the VCO. An accurate analysis of the voltage regulator circuit is needed for the optimal design of the voltage regulator. This paper clarifies the two inaccuracies in a recent paper on the replica-compensated regulator for supply-regulated PLLs: neglect of MOSFET parasitic capacitances and an ill-founded assumption that the frequency responses for the two loops are equal to each other. As a consequence, an improved analytical model is derived for the replica-compensated voltage regulator. The derived model is verified through circuit simulation.
Keywords :
voltage regulators; voltage-controlled oscillators; VCO voltage regulator circuit; circuit simulation; power-supply noise reduction; replica-compensated voltage regulator; supply-regulated PLL; Analytical models; Circuit noise; Circuit simulation; Frequency; MOSFET circuits; Noise reduction; Parasitic capacitance; Regulators; Voltage control; Voltage-controlled oscillators; Voltage regulator; power-supply noise;
Conference_Titel :
SoC Design Conference, 2008. ISOCC '08. International
Conference_Location :
Busan
Print_ISBN :
978-1-4244-2598-3
Electronic_ISBN :
978-1-4244-2599-0
DOI :
10.1109/SOCDC.2008.4815579
