The differential amplifier shown in Figure P11.60 has a pair of pnp bipolars as input devi...

The differential amplifier shown in Figure P11.60 has a pair of pnp bipolars as input devices and a pair of npn bipolars connected as an active load.

The circuit bias is IQ = 0.2 mA, and the transistor parameters are β = 100 and VA = 100 V. (a) Determine I0 such that the dc currents in the diff-amp are balanced, (b) Find the open-circuit differential-mode voltage gain, (c) Determine the differential-mode voltage gain if a load resistance RL = 250 kΩ is connected to the output.