Draw MOSFET differential amplifier below. Set the input signal source V3 paramet
ID: 2316628 • Letter: D
Question
Draw MOSFET differential amplifier below. Set the input signal source V3 parameters as follows: Use the Bias Current display to read the following currents, I_1, I_2, I_ref and I_0. Also note the voltage VCS. You would need this information while answering question 1. Create a new simulation profile "Time Domain". Set the simulation settings as follows: Analysis Type to "Time Domain (Transient), and Run to time 400 us. Make "Maximum step size = 1 us". Press OK to close the window. Run the simulation.Explanation / Answer
This circuit is an audio amplifier capable of delivering a decent output power with a minimum no: of parts , with considerable sound quality.
The amplifier employs only one transistor and two MOSFETs and few resistors and capacitors in a shunt feedback scheme.This tiny circuit can can deliver a whopping 18Watts into 8 Ohm speaker or 30W into a 4 Ohm speaker.
To get such a good performance and stability out of few components, a high quality well regulated DC power supply is necessary. This is very essential for reducing noise and getting a constant output power on varying loads. A good DC voltage regulator able of providing more than 2 Amps @ 40V can be used.You can expect such a power supply design very soon here in the power supply section.
Tips.
Assemble the board on a good quality PCB.Use a preamplifier board with tone control prior to this amplifier to get better performance. If you don’t want, then no problem because this amplifier circuit has enough punch with in it.