In this paper, Lock range, Capture range, frequency stability of the VCO by source voltage variation of the frequency multiplier are experimented and frequency multiplier is composed by the PLL and the frequency divider.
Because multiplication rate ...
In this paper, Lock range, Capture range, frequency stability of the VCO by source voltage variation of the frequency multiplier are experimented and frequency multiplier is composed by the PLL and the frequency divider.
Because multiplication rate passes the reference output to the VCO through R and C, it is possible to multiply about ten times the maximum free running frequency of VCO, 500KHz.
The capture range has no concern with the multiplication constant and it has about 70KHz to 80KHz bandwidth when the input voltage is 50mV/div but lock range is decreased as much the frequency divider rate as multiplication constant. Though the frequency variation of the VCO has no concern with source voltage, a amplitude varition happened.