Gradual charge pump technique for optimizing phase locked loop (PLL) function in sub-pixel generation for high speed laser printers switching between different speeds

摘要: Methods and apparatus for optimizing the phase lock loop circuitry of sub-pixel clock generators situations where frequent switching between different system printing speeds, hence frequencies are required. A timing control logic is associated with generator a graduated change in charge pump current. The comprises plurality current serially connected via switches selective adjustment manner.