What is a PGA? What are its design criteria?

PGA

What is a PGA? and what are its design criteria?

Re: PGA

PGA: programable gain amplifier?!

When its appliccation differs,such as video,or
medical,communication...its requirements differs.

Re: PGA

i think that is programmable gate array, i think that is the shortest way to say FPGA.
Bye.
G.

Re: PGA

programmable gain amplifiers are devices which help to control gain of analog or digital signals through serial or parallel digital i/ps each digital i/p controlling the gain have certain gain factor if there is a 3-bit gain control port you can have 8 different steps of gains. u just need to apply the signal to the input and acheive the desired amplification at the out put with the specific gaincontrol bits. microchip provide a wide range of such amplifiers that you can look at www.microchip.com.

Re: PGA

[PGA] programable gain amplifier !

Amplifier gain accept digital circuit control.

Re: PGA

Yap.. PGA is Programmable Gain Amplifier... usually used in data acquisition system to have variable gain as a signal conditioner...

PGA

Hi, Sheraz Akhtar, do you have any data about PGA?

PGA

hi,

can anyone please upload documents regarding the same. i want to know in and out about PGAs.

Re: PGA

programmable gain amplifier, or called digitally controlled variable gain amplifier (VGA), usually applied to provide constant output amplitude with variable input signal levels, typically used in a Automatic Gain Loop. PGAs are usually presented in the back end of the receiver (before ADC, baseband), while analog controlled VGAs are used in front-end of the receiver (RF band, just after the LNA). The key specificatoins are gain variation range, linearity, dB-linear gain control charactersitic, and other specs used in OpAmp/RF amp. Design a wide-range, low-distortion, low-power (especially for mobile applications) PGA is not an easy job. For example, in wideband receiver (vedio) before a 12-bit ADC, PGA with THD less than (6*12+1.8)=74dB is required, typically dB-linear range is 30dB.