Current Controlled Current Source (CCCS) Circuit: An ideal form of a Current Controlled Current Source (CCCS) Circuit by an input current is shown in Fig. 36.39. Such a circuit provides an output current dependent on the input current. A practical form of the circuit is built using an op-amp, as shown in Fig. 36.40. Output […]
Current Controlled Voltage Source (CCVS) Circuit: An ideal form of Current Controlled Voltage Source (CCVS) Circuit providing an output voltage controlled by an input current is shown in Fig. 36.37. The output voltage Vout is dependent on the input current Iin. A practical form of the circuit is built using an op-amp as shown in Fig.
Voltage Controlled Current Source (VCCS) Circuit: An ideal form of a current source, whose output current Iout is controlled by an input voltage is shown in Fig. 36.35. Here, the output current Iout is dependent on input voltage Vin. A practical circuit can be built, as shown in Fig. 36.36, with the output or load current
Voltage Controlled Voltage Source (VCVS) Circuit: An ideal form of a voltage source, whose output voltage Vout is controlled by an input voltage Vin, is given in Fig. 36.33. The output voltage is seen to be dependent on the input voltage (times a scale factor K). Such a circuit can be built by connecting an
Current to Voltage Converter Circuit: A device that produces a voltage proportional to input signal current is called a Current to Voltage Converter Circuit. The circuit arrangement is shown in Fig. 36.27. In this circuit, a photocell or photomultiplier tube that provides output current proportional to the light flux but independent of the load impedance,
Voltage to Current Converter Circuit: Occasionally in industrial electronics, it is necessary to provide a current proportional to certain voltage, even though the load impedance may vary. A circuit which can perform this job, is called a Voltage to Current Converter Circuit. The circuit of Voltage to Current Converter Circuit is shown in Fig. 36.25.
Summing, Scaling and Averaging Amplifier: The most useful of the op-amp circuits employed in analog computers is the summing amplifier circuit. This circuit can be used to add ac or dc signals. This circuit provides an output voltage proportional to or equal to the algebraic sum of two or more input voltages each multiplied by
Frequency Response of Common Mode Gain of Differential Amplifier: Low values of common-mode gain are desirable so that the circuit can reject undesirable signals that are applied equally to both inputs. The common-mode (CM) gain becomes important because undesired common-mode signals may have high-frequency components. The important aspects of the Frequency Response of Common Mode
Compensating Network in Op Amp: In op-amps the variations in gain and phase shift with respect to frequency are due to the internal capacitors and stray capacitances, which are due to physical characteristics of semiconductor devices (BJTs and FETs) and the internal construction of the op-amp. The rate of change of gain as well as
Single Stage Amplifier Frequency Response and Phase Response Curves: The voltage gain of a single-stage transistor amplifier commences to fall off at some high frequency. This fall-off may be due to the construction of the individual transistor or to stray capacitance in the circuit. Gain-frequency response of single stage amplifier is depicted in Fig. 35.1,