Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
THere are 2 regions of operation in FET, one is the saturation where current remains virtually constant of vds ...... In the other region caled the triode or the linear region , the current increases linearly with Vds but the slope will increase with Vds ...... This means FET acts as a resistor whose value is controlled by a voltage .....
Thus u cn use it as a VVR ( Voltage Variable Resistor )
Any FET in nonsaturation is like a resistor. Its resistance is nonlinear because of several nonidealities. As far as I know, it is linear only in deep nonsaturation when VDS=0. To obtain a linear resistance, efficiently tuned by a voltage you have to have a circuit, for example 4-MOSFET Czarnul-Song resistance. All MOSFETs are operating here in nonsaturation, and the input and output is differential as well as the control voltage. A.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
