Programming instructions

Mixed Components
Multisim Component Reference Guide 10-6 ni.com
10.5.2 Phase-Locked Loop Parameters and Defaults
10.6 Multivibrators
10.6.1 CD4538BC
The CD4538 is a dual, precision monostable multivibrator with independent trigger and reset
controls. The device is retriggerable and resettable, and the control inputs are internally
latched. Two trigger inputs are provided to allow either rising or falling edge triggering. The
reset inputs are active LOW and prevent triggering while active. The pulse duration and
accuracy are determined by external components R
X
and C
X
. The device does not allow the
timing capacitor to discharge through the timing pin on power-down condition. For this
Symbol Parameter name Default Unit
Kd Phase detector conversion gain 0.25 V/rad
Ko VCO conversion gain 500 kHz/
V
fc VCO free-running frequency 250 kHz
fp Low-pass filter cut-off frequency 25 kHz
Vo m VCO output amplitude 1.0 V
-- PLL Input Offset 0 V
-- PD Input Offset 0 V
-- VCO Output Offset 0 V
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