Designing MOSFET amplifier

[dismas]

Hi, I am trying to build a MOSFET amplifier using CD4007UBE MOSFETs
I have found a datasheet here https://www.ti.com/lit/gpn/cd4007ub
Sorry if this sounds like a stupid question, but is the CD4007UB datasheet the same as the CD4007UBE?
Also, what is the k'n, W/L, and turn-on voltage of this MOSFET? I could not find it in the data sheet.

 

[Electronworks]

You are looking at a CMOS logic gate, not a discrete MOSFET. This part will only output milliamps and is designed to be used in a digital circuit, not as I suspect, what you want - an analogue power amplifier for an audio application or similar.

take a look at Fairchild discrete MOSFETs:

MOSFET - Fairchild Semiconductor Site Search

I think this is what you need

 

[ericgibbs]

Hi, I am trying to build a MOSFET amplifier using CD4007UBE MOSFETs
I have found a datasheet here https://www.ti.com/lit/gpn/cd4007ub
Sorry if this sounds like a stupid question, but is the CD4007UB datasheet the same as the CD4007UBE?
Also, what is the k'n, W/L, and turn-on voltage of this MOSFET? I could not find it in the data sheet.

hi,
These IC's are unbuffered, so they can be used to make low signal amplifiers or oscillators.
The turn on voltages are shown in the datasheet and a function of the supply voltage.
The UB means UnBuffered.

What type of of amp are you designing.?

 

[dismas]

Hi Electronworks, I'm doing this for a class project and they gave us CD4007UBEs to use.

Hi ericgibbs, I'm doing this for a class project. It's basically a multi-stage amp that has a small signal gain of 40. Also, can you point out which graph shows that turn-on voltage function? I looked, but I must be missing something. I suspect I'm missing something in my electronics education, as my professor never mentioned that turn-on voltage wasn't constant.

 

[ericgibbs]

Hi Electronworks, I'm doing this for a class project and they gave us CD4007UBEs to use.

Hi ericgibbs, I'm doing this for a class project. It's basically a multi-stage amp that has a small signal gain of 40. Also, can you point out which graph shows that turn-on voltage function? I looked, but I must be missing something. I suspect I'm missing something in my electronics education, as my professor never mentioned that turn-on voltage wasn't constant.

hi,
Look at this link:
**broken link removed**
and this
FET_P3

and this pdf, Section #3.

 

[audioguru]

If you make each pair of Mosfets an inverting amplifier then it biases its output near half the supply voltage automatically. Its output current is fairly low so use high value resistors.