What can be used as a voltage controlled voltage source?
A voltage source that depends on a current input is referred too as a Current Controlled Voltage Source or CCVS. Ideal dependent sources are commonly used in the analysing the input/output characteristics or the gain of circuit elements such as operational amplifiers, transistors and integrated circuits.
How can voltage source be dependent on another voltage source?
In the theory of electrical networks, a dependent source is a voltage source or a current source whose value depends on a voltage or current elsewhere in the network. An operational amplifier can be described as a voltage source dependent on the differential input voltage between its input terminals.
What are the different types of dependent source?
There are four possible dependent sources: the voltage-controlled voltage source (VCVS), the current-controlled voltage source (CCVS), the voltage-controlled current source (VCCS), and the current-controlled current source (CCCS).
How does a voltage controlled current source circuit work?
In a voltage-controlled current source circuit, as the name implies, a small amount of voltage across the input will proportionally control the current flow across the output loads. This type of circuit is commonly used in electronics to drive current-controlled devices like BJT, SCR , etc.
Can a voltage-controlled current source be built using op-amp?
In this project, we will explain how a voltage-controlled current source using op-amp can be designed and also build it to demonstrate its working. This type of voltage-controlled current source circuit is also called a current servo. The circuit is very simple and can be constructed with a minimum number of components.
How does current sourced to the load work?
Current sourced to the load = Voltage drop / Shunt Resistance. As discussed before, the voltage drop will be the same as the input voltage across the op-amp. Therefore, if the input voltage is changed, the current source through the load will also change.
Can a control voltage be given from a variable voltage divider?
As the control voltage is applied from an external source, both channels need to be in the same potential, thus the ground terminal of the second channel is connected across the first channel ground terminal. However, this control voltage can be given from a variable voltage divider using any kind of potentiometer.