Power supply regulator circuit for voltage-controlled oscillator

Details Power supply regulator circuit for voltage-controlled oscillator Power supply regulator circuit for voltage-controlled oscillator

1999-03-04

2000-12-05

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323313, 323315, G05F 140, G05F 320

Patent

active

061571806

ABSTRACT:
A power supply regulator circuit with increased rejection of variations and noise in power supply voltage which is particularly well suited to isolating a voltage-controlled oscillator (VCO) from such power supply variations and noise. The regulator circuit uses an operational amplifier connected as a voltage follower circuit to buffer the reference voltage provided as the regulated supply potential for the VCO. This buffered voltage is also used to establish the bias voltage across a current mirror circuit which is powered by the unregulated power supply and through which the supply current for the VCO flows. This circuit topography requires no compensation capacitance and, therefore, provides increased rejection of variations and noise in the power supply voltage.

REFERENCES:
patent: 4547741 (1985-10-01), Katakura
patent: 5175512 (1992-12-01), Self
patent: 5661428 (1997-08-01), Li et al.
patent: 5739678 (1998-04-01), Nagaraj

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