Operational amplifier Electronics

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					Operational amplifier                                                                                                                                                          Electronics
 P 4.2.2
Operational
amplifier circuits

P 4.2.2.1 Unconnected operational
          amplifier (comparator)
P 4.2.2.2 Inverting operational amplifier
P 4.2.2.3 Non-inverting operational
          amplifier
P 4.2.2.4 Adder and subtracter
P 4.2.2.5 Differentiator and integrator




                                                        Adder and subtracter (P 4.2.2.4)



The first experiment shows that the unconnected operational




                                                                                                                                                                                            P 4.2.2.2

                                                                                                                                                                                                        P 4.2.2.3

                                                                                                                                                                                                                    P 4.2.2.4

                                                                                                                                                                                                                                P 4.2.2.5
                                                                                                                                                                                P 4.2.2.1
amplifier overdrives for even the slightest voltage differential at
                                                                                                                       Cat. No.   Description
the inputs. It generates a maximum output signal with a sign cor-
responding to that of the input-voltage differential.                                                                  576 74     Plug-in board, DIN A4                         1           1           1           1           1
In the second and third experiments, the output of the operation-                                                      578 85     STE operational amplifier LM 741              1           1           1           1           1
al amplifier is fed back to the inverting and non-inverting inputs                                                     577 32     STE resistor 100 E, 2 W                                               1
via resistor R2. The initial input signal applied via resistor R1 is                                                   577 38     STE resistor 330 E, 2 W                                                           1
amplified in the inverting operational amplifier by the factor
                                                                                                                       577 40     STE resistor 470 E, 2 W                                               1           1
                R
        V= – 2                                                                                                         577 44     STE resistor 1 kE, 2 W                                    1                       1           1
                R1                                                                                                     577 46     STE resistor 1.5 kE, 2 W                                              1           1

and in the non-inverting module by the factor                                                                          577 48     STE resistor 2.2 kE, 2 W                                              1
                                                                                                                       577 50     STE resistor 3.3 kE, 2 W                                  1
           R
       V= 2 + 1                                                                                                        577 52     STE resistor 4.7 kE, 2 W                                  1           1                       1
           R1                                                                                                          577 56     STE resistor 10 kE, 0.5 W                     1           2           2           2           1
The fourth experiment demonstrates the addition of multiple input                                                      577 58     STE resistor 15 kE, 0.5 W                                             1
signals and the subtraction of input signals.                                                                          577 60     STE resistor 22 kE, 0.5 W                                                         1
The aim of the final experiment is to use the operational amplifier                                                    577 61     STE resistor 33 kE, 0.5 W                     2           1                       1
as a differentiator and an integrator. For this purpose, a capacitor                                                   577 62     STE resistor 39 kE, 0.5 W                     1
is connected to the input resp. the feedback loop of the opera-                                                        577 64     STE resistor 47 kE, 0.5 W                                 2
tional amplifier. The output signals of the differentiator are
                                                                                                                       577 68     STE resistor 100 kE, 0.5 W                    1           1                       4           1
proportional to the change in the input signals, and those of the
                                                                                                                       577 74     STE resistor 470 kE, 0.5 W                    1
integrator are proportional to the integral of the input signals.
                                                                                                                       577 76     STE resistor 1 ME, 0.5 W                                                                      1
                                                                                                                       577 80     STE regulation resistor 10 kE, 1 W                        1           1
                                                                                                                       577 96     STE potentiometer 100 kE, 1 W                 2           1                                   1
                                                                                                                       578 15     STE capacitor 1 µF, 100 V                                                                     1
                                                                                                                       578 16     STE capacitor 4.7 µF, 63 V                                                                    1
                                                                       P 4.2.2.2

                                                                                   P 4.2.2.3

                                                                                               P 4.2.2.4

                                                                                                           P 4.2.2.5
                                                           P 4.2.2.1




                                                                                                                       578 26     STE capacitor 2.2 nF, 160 V                   2                                               1
 Cat. No.   Description
                                                                                                                       578 28     STE capacitor 10 nF, 100 V                    1                                               1
 522 621    Function generator S 12, 0.1 Hz to 20 kHz       1          1           1                       1           578 51     STE Si diode 1 N 4007                         1
 575 211    Two-channel oscilloscope 303                    1          1           1                       1           578 76     STE transistor BC 140, NPN, emitter bottom                                                    1
 575 24     Screened cable BNC/4 mm                         2          2           2                       2           501 48     Set of 10 bridging plugs                      1           1           1           1           1
 531 57     Multimeter METRAport 3E                                    1           1           1                       521 45     DC power supply 0....+/- 15 V                 1           1           1           1           1
 500 424    Connection lead, 50 cm, black                  8           8            9          8            7



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Description: Operational amplifiers (referred to as "op amp") is a high magnification of the circuit unit. In the actual circuit, the feedback network is usually composed of a combination of functional modules. Since the early analog computer used to implement mathematical operations, so the name "op-amp." Op amp is a name from a functional point of view of circuit elements, can be achieved by the discrete devices, can also be achieved in the semiconductor chip. With the development of semiconductor technology, most of the op amp is a single-chip form. A wide range of op amp, which is widely used in the electronics industry.