# Questions tagged [biasing]

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### Emitter resistor and biasing voltage

In many articles regarding transistor biasing I see a circuit like below and I don't really get what is the point of biasing like this WITHOUT emitter resistor Re? When emitter branch is connected ...
93 views

### Howland current source with voltage reference [closed]

I need a precision current pump for small ac signals(50uA) and i tried it in multisim with a howland topology. It works however i need the load to not be grounded but bound to a bias voltage. Here i ...
53 views

### Why is the effective base resistance important for the voltage divider BJT amplifier?

I came across many questions regarding the below type of biasing where they explain and analyze Rth Vth and conclude that Rth must be very small comparing to Rin. Rin is the effective resistance seen ...
87 views

### What exactly is meant by beta dependence in this fixed bias BJT scheme? [duplicate]

What I understand that, in a fixed bias BJT scheme the problem is beta dependence. Below is an example from a text: Now I read that this is not a good design. But I will still solve this by assuming ...
61 views

### Bias voltage of transistor [closed]

I would like to understand the purpose of biasing the transistor and why It has to be halfway between Vcc and ground? And which terminal of the transistor (Base, collector or emitter) should be ...
33 views

### Is Q-Point in Transistor constant? For different configuration if same transistor is used?

Via IV-Characteristics, for specific Ib, I got the Q-Point and using the same value of the Q-Point, I constructed a common emitter configuration biasing circuit that its V_ce = Q-Point_Voltageafter ...
55 views

### Deriving that Vin is way larger than nVt from Shockley equation

I am trying to show that from the Shockley equation Vin >> nVt. Given a simple diode circuit like this So far, I have equated the current through the resistor $I = \frac {V_{in} - V_{D1}} {R_1}$ ...
39 views

### Biasing an Enhancement NMOS with Gate-Source Connected

I'm working on a university project wherein a full-wave rectifier is constructed using two enhancement mode NMOS transistors. I'm tasked with designing a biasing circuit for the NMOS', but I don't ...
38 views

364 views

### DC analysis of common-drain NMOS amplifier

The DC analysis is regarding the amplifier calculations, but that is not relevant to the topic. The equivalent DC circuit of the amplifier is: The known values are: $Rg1=300k\Omega$, \\$Rg2=200k\...
142 views

### Pre-amplifier biased to one-half of power source

There is a schematic of an pre-amplifier that use one-half of voltage source output biasing (T1 emitter is one-half of V1). How the resistive network was calculated to allow one-half output Q-point? ...
2k views

### Difficulties in biasing MOSFET push-pull amplifier

Everything works perfectly well and following the expected in the simulations on MultiSim. This is what the test-version of my circuit project looks like: I made this version of the circuit to ...