Voltage Controlled Resistor. A voltage controlled resistor vcr is a three terminal active device with one input port and two output ports. This subcircuit consists of two controlled sources and employs an external reference component that is sensed.
Varistor Is A Voltage Dependent Resistor It Has Non Linear Current Voltage Characteristics Generally Used In Circuit Protection From Voltage Surges And Ex from www.pinterest.com
This is achieved using the following circuit. The output impedance equals the value of the control voltage times the reference. Basic voltage controlled resistor vcr circuits.
This special resistor is defined using the zx subcircuit from anl misc lib.
V i x r x vc. The basic circuit forms a voltage divider as shown in figures 3 4 5 and 6. Here s a subcircuit for this device subckt vc res1 10k 1 2 4 5 eres 1 3 value i vsense 10k v 4 5 vsense 3 2 dc 0v ends. Vcrs are most often built with field effect transistors fets.
