申論題

4. (25%) A BJT differential pair is shown as below. Two synchronized sinusoidal waves (vsint and vsin-) All BJTs are assumed to be the same with β=100 and Early voltage VA- ∞.] Please evaluate the following at room temperature (V_T=25mV):

(5%) (b) Since R₁ and R₂ are different, what is the resulted offset voltage () at input? (hints: you can estimate this by dividing the output offset by the differential gain, Ad).