Analog Lab Report 2
Introduction
An operation amplifier (op-amp) is an integrated circuit that amplifies the differential voltage between non-inverting input and inverting input to yield a single amplified output. In
An operational amplifier (op-amp) is an integrated circuit that amplifiers the difference between two inputs voltages and produces a single output. The op-amp is prevalent in analogue electronics, and can be thought of another electronics device which is bipolar or field-effect transistor. The op-amp is one of the basic building blocks of linear design. Its consists of two high impedance inputs, one called the Inverting input ( - ) which inverts the phase of the signal, the other called the Non-inverting input ( + ) which preserves the phase, and an output terminal. Figure below shows the standard symbol of an op-amp: There are many types of op-amp but its either operate as positive feedback or negative feedback. In this experiment, negative feedback op-amp is used at which there is a portion of the output that is fed back to the inverting terminal to establish the fixed gain for the amplifier. Any differential voltage across the input terminals of the op-amp is multiplied by the amplifier’s open-loop gain, A. The open-loop gain of the amplifier will attempt to force the differential voltage to zero. As long as the input and output stays in the operational range of the amplifier, it will keep the differential voltage at zero. The output of the op-amp will be the product of input voltage and the gain set by the feedback.
A commonly used op-amp is A741 with the pin diagram and symbol as shown below:
1 – Offset null 1 5 – Offset null 2
2 – Inverting input 6 – Output
3 – Non-inverting input 7 – Positive DC supply
4 – Negative DC Supply 8 – Not connected
OVERVIEW
Part A: Measurement of offset parameters
The circuit configuration was constructed as shown in Figure 1, which VCC = VEE = 15 V, C = 0.01 µF, R1 = RF = 100 kΩ.
Figure 1: Measuring offset
An operation amplifier (op-amp) is an integrated circuit that amplifies the differential voltage between non-inverting input and inverting input to yield a single amplified output. In
An operational amplifier (op-amp) is an integrated circuit that amplifiers the difference between two inputs voltages and produces a single output. The op-amp is prevalent in analogue electronics, and can be thought of another electronics device which is bipolar or field-effect transistor. The op-amp is one of the basic building blocks of linear design. Its consists of two high impedance inputs, one called the Inverting input ( - ) which inverts the phase of the signal, the other called the Non-inverting input ( + ) which preserves the phase, and an output terminal. Figure below shows the standard symbol of an op-amp: There are many types of op-amp but its either operate as positive feedback or negative feedback. In this experiment, negative feedback op-amp is used at which there is a portion of the output that is fed back to the inverting terminal to establish the fixed gain for the amplifier. Any differential voltage across the input terminals of the op-amp is multiplied by the amplifier’s open-loop gain, A. The open-loop gain of the amplifier will attempt to force the differential voltage to zero. As long as the input and output stays in the operational range of the amplifier, it will keep the differential voltage at zero. The output of the op-amp will be the product of input voltage and the gain set by the feedback.
A commonly used op-amp is A741 with the pin diagram and symbol as shown below:
1 – Offset null 1 5 – Offset null 2
2 – Inverting input 6 – Output
3 – Non-inverting input 7 – Positive DC supply
4 – Negative DC Supply 8 – Not connected
OVERVIEW
Part A: Measurement of offset parameters
The circuit configuration was constructed as shown in Figure 1, which VCC = VEE = 15 V, C = 0.01 µF, R1 = RF = 100 kΩ.
Figure 1: Measuring offset