Patent ID: 6392452
Filing Date: 2002-05-21
Classification: H03K,H03L

Abstract:
An input buffer circuit of a prescaler for pre-dividing an oscillating signal having a radio band frequency in a frequency divider of a radio frequency phase-locked loop (RF PLL), the input buffer circuit comprising: switching circuit receiving a first switching current from a power supply voltage source, switching the first switching current in response to the oscillating signal, and generating first and second switching signals by converting the first switching current into first and second switching voltages;second switching means for receiving a second switching current from the power supply voltage source and switching the second switching current, in response to the first and the second switching signals; loading means coupled to the second switching means for generating third and fourth switching signals by converting both the first and second switching currents into third and fourth switching voltages; and output driving means for outputting first and second output signals in response to the third and fourth switching signals, respectively.