D 2.61 Using the difference amplifier configuration of

Fig. 2.16 and assuming an ideal op amp, design the circuit

to provide the following differential gains. In each case, the

differential input resistance should be 20 ks2.

(a) 1 V/V

(b) 5 V/V

(c) 100 V/V

(d) 0.5 V/V

R₁

Uom

R₂

Uno- www

R₁

R₂

Vo

Figure 2.16 A difference amplifier.