Transistor Amplifier

Instructions:

1. Propose values of the devices at Fig. 1 so that the operation point of the transistor Q1 will be in active mode - the voltage between collector and emittor must be 5 V.
   Figure 1: Scheme of the transistor amplifier Implement this circuit and prove the correctness of your proposal by measurement. Propose minimal value of the coupling capacitor on the input for frequency of 1 kHz.
2. Using the curve tracer, measure current amplification of the used transistor at operation point that you have used (from Fig. 1). Determine voltage amplification of the circuit at Fig. 1 for the outputs A and B. Compare your calculations to the measurement. Find out the dynamical range of the amplifier.
3. Block the resistor R4 at Fig. 1 by capacitor of 100 microfarads (or more) and measure the amplification of the circuit for the outputs A and B again. (to block means to short-circuit the resistor for alternating current by parallel connection of the capacitor)

Notes:

• the convention for amplification of a circuit is, that amplification of an inverting circuit has minus sign.
• dynamic range means the range of the output voltage, within which there is no significant distortion of the amplified signal.