this circuit is used to amplify and conditioning signals range from 0-+/-5V,and frequency range from 0-10KHz.

the first amplifier is pga204ap,(digital gain select of 1,10,100,1000),and dual +/- 15V power supplied.each power pins
of pga204 has 0.1uF cap very near to the pins. and have a 500k ohm potentiometer to adjust offset voltage of pga204,with its middle pin connect to +15V. then the signal goes to a clock sweeptable filter of LTC1064-1CN,(100:1 ratio), the LTC1064-1cn
has dual power supply of +/-8v,with each power pin has a low pass RC filter(10ohm in series plus 0.1uF and 1uF caps in parallel), the output of ltc1064-1cn feed to negative input pin of one part of opa4277 through a high precision 10K ohm resistor(0.1% error),and the positive input pin is tied to
middle pin of a 25K potentiometer to adjust the offset range from -2.5v--+2.5V.and this pin is also tie to a 1uF cap to ground for filtering.

there are 1 0.1% matched 10K ohm resister and 120 pf cap in parallel across negative input pin and output pin,in order to
reach a closed loop gain of 1. the opa4277 is dual power supplied of +/-15V,and has 0.1uF to ground for each power pins.

finally the output of opa4277 is for final ouput with a 33pF cap
to ground.

the drive clock for ltc1064 is generated and controlled by a at89c2051 and some logic part.

the power is get from 220V/50Hz ac supply through a 30W pcb mounted AC/DC(on the same board,it has a copper shell to avoid power emition),which ouput +/-15V,i put 2200uF cap at the output, which is used to power the amplifiers. the +/-8V is get from +/-15V by LM317and 337 pair,and the +/-2.5V is get from +/-8V by potentiometers.

i don't know if this is enough detail,if u need more,please tell me.