Cmos inverter - calculate gain - Electronic Circuits Projects Diagrams Free

Electricman2K5 · 29th April 2005, 09:43 PM

does anyone know how to calculate the gain from a cmos inverter such as a hex 4069 device. Ive seen people using them instead of op amps for gain..what are the advantages of this???????

audioguru · 30th April 2005, 05:11 AM

Hi Electricman,
A Cmos linear amplifier has a very high distortion at large output swings. With a very low level signal it works OK but is noisy.
Here is a description of them with typical gain:
http://www.fairchildsemi.com/an/AN/AN-88.pdf

Russlk · 1st May 2005, 12:52 AM

You calculate the gain same as an op amp: gain = Rf/Ri. The advantage is that you get 6 of them in a package. Keep in mind that the input and output are at about 1/2VCC.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

29th April 2005, 09:43 PM	(permalink)
Electricman2K5	Cmos inverter - calculate gain does anyone know how to calculate the gain from a cmos inverter such as a hex 4069 device. Ive seen people using them instead of op amps for gain..what are the advantages of this???????

30th April 2005, 05:11 AM	(permalink)
audioguru	Hi Electricman, A Cmos linear amplifier has a very high distortion at large output swings. With a very low level signal it works OK but is noisy. Here is a description of them with typical gain: http://www.fairchildsemi.com/an/AN/AN-88.pdf __________________ Uncle $crooge

1st May 2005, 12:52 AM	(permalink)
Russlk	You calculate the gain same as an op amp: gain = Rf/Ri. The advantage is that you get 6 of them in a package. Keep in mind that the input and output are at about 1/2VCC. __________________ see my website: www.geocities.com/russlk