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Can a transistor be used as a variable resistor?
A transistor within an electronic circuit works like a combination of a diode and a variable resistor, also called a potentiometer or pot. This changes the resistance of the potentiometer, which in turn changes the amount of current that can flow through the collector-emitter path.
Can a transistor be a resistor?
A transistor is like a resistor, except that the resistor can be controlled by a second input called base input; It should also be noted that the gate input of the transistors is the transmitter and the output is the collector (its backward reason).
Can we use MOSFET as resistor?
A MOSFET can easily be used as a variable resistor. The minimum resistance you need and the RDS(on) of the MOSFET chosen. The MOSFET’s behavior in the linear region though it is similar for almost all the MOSFETs.
Can BJT be used as resistance?
Resistor is linear device whereas BJT is nonlinear device. MOSFET is used as a resistor and can also be used by you in the bridge circuit. The ON-state is reasonable linear and there is no current flow through the gate under steady state (as it is a Voltage controlled device).
How is the base of a transistor held low?
When a logical input to the SN7407N is high, the output of its internal NOT gate is low. Since the output of the NOT gate is connected (through a resistor) to the base of the internal NPN transistor, the base of the transistor is held low.
What kind of circuit is a LFO circuit?
This is a fairly simple LFO circuit, whose wave shape can be smoothly varied between downward ramp, triangle and upward ramp. In addition, a square/pulse wave and a sine wave output are given. Below is a basic and common triangle oscillator circuit, consisting of an integrator (U1a, R1, C1) and a Schmitt trigger (U1b, R2, R3).
What is the base voltage of a PNP transistor?
On the low-current path, we begin with 12 V, have the emitter-base voltage of the PNP transistor (a diode drop; about 0.7 V), the 1 k? resistor, and the collector-emitter voltage of the NPN transistor (maybe 0.3 V) to ground. The current flowing through these elements is then roughly
What is the purpose of the 1 kilo ohm resistor?
One question I had was – what is the purpose of the 1 kilo-ohm resistor that is connected to the base of the PNP transistor?