Transconductor circuit for a fourth order PLL

摘要: A phase locked loop (PLL) circuit and a method for providing transconductance in the PLL involve forming an input voltage to operational amplifier by filter. output of controls plurality current mirrors. is formed through first one mirrors as function voltage, resistance resistor, reference voltage. The directly provided by, or derived from, signal. second mirror fed back maintain mirror, which then mirrored into at least form proportional difference between