A variable resistor device using a field effect transistor wherein two resistors having an equal value of resistance are connected in series between the source and drain of the field effect transistor and a variable control D.C. voltage source is connected between the gate and the connection ...
This work demonstrates how to create a metamaterial with a tunable bandwidth that utilizes a transistor as a variable linear resistor. Bandwidth Tuning in Transistor Embedded Metamaterials Using Variable Resistance "Silicon transistors are approaching their size limit," Moon Kim, a professor of materials...
voltage (e.g. from a battery or from an A.G.C. or pulse source) is supplied, the operation of the transistor as a bidirectional resistor being linearized by the application of an appropriate fraction of the voltage developed between source and drain electrodes to the gate electrode or ...
The function of the variable resistor is to allow regulation of the voltage supplied to the load. The Zener diode discussed in Section 2.1.34 is often used in this capacity to provide a stabilized voltage supply. For high-power systems, thyristors are used in place of diodes as the ...
This is the region in which the FET acts as a variable resistor and obeys Ohm's law, that is, the I-V curves become less steep as the negative bias on the gate increases, indicating that the resistance of the channel increases. For example, for Vgs = 0 V, the slope of the curve ...
I can change it with simple potentiometer, or a digital pot via SPI, but I don't know how to do a similar thing in an analog way (voltage control) with a transistor as a "variable resistor", I don't even know if it is possible (many people are doing it with transconductance ...
Part of the output of a push pull Clapp oscillator is rectified and smoothed to provide a voltage for stabilizing the oscillation amplitude, the control voltage being fed to the base of a transistor that acts as a variable resistance in a voltage divider connected to the bases of the push ...
If you use a relay in the circuit in place of LED & resistor after that the same value of relay you have to use like the i/p voltage. Avariable resistorwith a 200KΩ value is used to regulate the circuit sensitivity. Once the touchpoints in the circuit are touched, then a small num...
Fig. 2: Microfluidic-transistor-based circuits replicate the behaviour of key electronic circuits. For each circuit, the schematic diagram (left), a photo of the microfluidic implementation with ports labelled (middle; false colour; scale bars, 1 mm) and a representative demonstration of circuit...
In this case, VGS will control the conductance of the channel or, in other words, the channel acts as a variable resistor. Thus, the conductance between source and drain (gDS) is dependent on both VGS and VDS. The gDS is obtained from this expression: (1.14)gDS=1rDS=kn(VGS−Vt−...