Patent ID: 7129792
Filing Date: 2006-10-31
Classification: H03B,H03D,H03J,H03L

Abstract:
1. A system for compensating the gain of a phase lock loop (PLL), comprising: a current scaler that generates a reference scale current; a capacitor control that switches a fixed capacitor into a VCO tuning circuit that is part of a VCO to tune a frequency of the VCO; and a current mirror arrangement operatively coupled to the current scaler and the capacitor control, the current mirror arrangement approximately scaling the reference scale current a number of times when the fixed capacitor is switched-in to the VCC) tuning circuit, the number of times that the reference scale current is approximately scaled being based on the fixed capacitor, the scaled current contributing to a reference charge pump current for the PLL, the reference scale current being adjusted based on a PLL control signal.