☑ Voltage Controlled Resistor Wiki

The field effect transistor as a voltage controlled resistor we consider the use of a n channel fet as a voltage controlled resistor where the resistance between the drain and source is controlled by the gate source voltage. Since no significant dc current flows in the varicap the value of the resistor connecting its cathode back to the dc control voltage resistor can be somewhere in the range of 22 kw to 150 kw and the blocking capacitor somewhere in the range of 5100 nf.

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Electronotes An 23 The Ca3080 As A Voltage Controlled

Varistor Or Voltage Dependent Resistor Vdr Resistor Guide

Also known as a voltage dependent resistor vdr it has a nonlinear non ohmic currentvoltage characteristic that is similar to that of a diodein contrast to a diode however it has the same characteristic for both directions of traversing current.

Voltage controlled resistor wiki. Vcrs are most often built with field effect transistors fets. Two types of fets are often used. There are two distinct regions.

The drain terminal is the output and the gate terminal is the input which is connected to a voltage reference. The input port voltage controls the value of the resistor between the output ports. A voltage controlled resistor vcr is a three terminal active device with one input port and two output ports.

In the ohmic region1 the drain to source current i ds depends on the gate to source. The jfet and the mosfet. Vcas have many applications including audio level compression synthesizers and amplitude modulation.

In electronic circuits resistors are used to reduce current flow adjust signal levels to divide voltages bias active elements and terminate transmission lines among other useshigh power resistors that can dissipate many watts of electrical power as heat may be used as. A crude example is a typical inverting op amp configuration with a light dependent resistor ldr in the feedback loop. A varistor is an electronic component with an electrical resistance that varies with the applied voltage.

A variable gain or voltage controlled amplifier is an electronic amplifier that varies its gain depending on a control voltage often abbreviated cv. Voltage controlled resistor description this circuit shows an epad mosfet inverter circuit connected as a voltage controlled resistor circuit. A resistor is a passive two terminal electrical component that implements electrical resistance as a circuit element.