Q1) Based on your Lab experience what is the difference between DC power and AC power.

Q2-What is Op-amp? How the Op-amp works?

Q3: What is VCC and VEE? 

 

Answer 1:

• DC power supplies constant power to the circuit and does not vary with respect to time. Whereas in the case of AC power, it supplies power sinusoidally with respect to time.
• DC power is unidirectional whereas AC power is bidirectional.
• DC power is ideal for charging batteries, capacitors and inductors in order to obtain a predictive charge level. Whereas in the case of AC power, it does not charge capacitors and inductors to their fullest level since the power supplied is bidirectional in nature.
• DC power cannot be used for transferring power from circuit to another circuit by the method of electromagnetic induction, but it is possible in the case of AC power.

Answer 2:

Op-amp, or operational amplifier is a voltage amplifier which is powered by using DC source(s). It has a multiple inputs and an output which can be configured (biased) to the desired voltage level, and usually has a very gain.

Op-amp's work by supplying the input terminals with different voltages. The differential voltage value is then sent to the opamp where it is then proportionally amplified to give a high-value, low-impedance output. This is usually done by installing appropriate resistors and capacitors in a predetermined layout.

Answer 3:

VCC stands for 'Voltage at Common Collector'. VCC is the voltage provided by an external device. It is the main source of power input to the circuit. The meaning traditionally stood for voltage provided across the collector terminals of transistors, and since the emergent of various semi-conductor devices, the term VCC is referred basically to all input power sources to the circuit.

VEE stands for 'Voltage at Common Emitter'. As the term suggests, it is usually connected to the emitter terminals of the transistors in the circuit. In many basic circuits, the VEE terminal has 0 volts (grounded) but in more advanced circuits, VEE will have negative voltage connected to the circuit. This is especially important in Op-amp's if biasing is required.