FET Common Source Amplifier with Unbypassed Source Resistors: Equivalent Circuit - When an unbypassed source resistor (RS) is present in a FET Common Source Amplifier circuit, as shown in Fig.11-10(a), it also appears in the…
Common Source Circuit Analysis: A FET Common Source Circuit Analysis is shown in Fig. 11-6. With the capacitors treated as ac short-circuits, the circuit input terminals are the gate and source, and the output terminals…
FET Equivalent Circuit Model: The complete FET Equivalent Circuit Model is shown in Fig. 11-5(a). It is seen that tilt source terminal is common to both input and out, so this is a common-source equivalent…
Coupling Capacitors: Coupling Capacitors are required at a circuit input to couple a signal source to the circuit without affecting the bias conditions. Similarly, loads are capacitor-coupled to the circuit output to avoid the change…
Biasing FET Switching Circuits: JFET Switching - A Biasing FET Switching Circuits is normally in an off state with zero drain current, or in an on state with a very small drain-source voltage. When the…
MOSFET Biasing Circuits: DE-MOSFET Bias Circuits - DE-MOSFET bias circuits are similar to JFET bias circuits. Any of the FET bias circuits already discussed can be used to produce a negative VGS level for an…
Universal Transfer Characteristics for FET: A Universal Transfer Characteristics for FET is simply a transfer characteristic plotted with IDSS = 1 and VP = 1. Then, instead of the scales being calibrated in milliamps and volts, they are…
JFET Biasing Circuits: Use of Plus/Minus Supplies - When plus/minus supply voltages are to be used with a JFET Biasing Circuits, the gate terminal is usually grounded via RG, as illustrated in Fig. 10-40(a). In…
JFET Bias Circuit Design: Design Approach - Design of JFET Bias Circuit Design is just as simple as design of BJT bias circuits. One major difference is that FET circuit design normally uses a graphical…
JFET Bias Circuit Troubleshooting: Voltage Measurement - JFET Bias Circuit Troubleshooting are similar to those for BJT bias circuits. The major difference is that there is only one junction in the FET (the gate-channel junction)…
