Register to reply

Cs_mosfet amplifier

by pforpashya
Tags: amplifier, csmosfet
Share this thread:
Apr8-14, 06:18 AM
P: 12
Hi all,

I am studying cs_mosfet amplifier and i have simulate one simple amplifier with VDD=+12v Vs=1v ID=0.5mA gm=1mA/v Vd=6v. I am getting a signal that is amplified by gain -11.3 by calculation and also on simulation but when doing on hardware i am getting gain around -40 to -45
I am using Bs 170 mosfet.

I have tried various combination of capacitors but still gain comes around -40......can anybody suggest me where is the mistake?
Phys.Org News Partner Engineering news on
New filter technology uses inert gas to bore holes in high-quality steel
Augmented reality helps in industrial troubleshooting
How wireless technology can dramatically improve ship safety
Apr8-14, 09:26 AM
P: 12
can anybody tell me how to attach file here?
Apr8-14, 12:05 PM
P: 409
How can you be sure that your real MOSFET Bs170 will indeed have gm = 1m?
Do know how to measure Vgs(th) and how you can find K - factor ?

PS Go advanced ---> Attach Files

Apr8-14, 03:32 PM
P: 519
Cs_mosfet amplifier

Can you verify you are using the correct transistor?

Can you verify you are using the correct resistor?

Have you verified the DC operating point?

Register to reply

Related Discussions
Instrument amplifier or just operational amplifier? Electrical Engineering 5
Operation amplifier - inverting amplifier Introductory Physics Homework 7
VOLTAGE-CONTROLLED AMPLIFIER . I am required to build a voltage-controlled amplifier Engineering, Comp Sci, & Technology Homework 3
Decide between two new stereo amplifiers Advanced Physics Homework 2
IR amplifier? Electrical Engineering 2