A CCVS (Current Controlled Voltage Source) is an electronic circuit element that produces an output voltage proportional to the current flowing through another element. It is also known as a Voltage-Controlled Voltage Source (VCVS).
Here's a breakdown of its key features:
- Output voltage: The output voltage of a CCVS is directly proportional to the controlling current.
- Controlling current: The current flowing through a specific element in the circuit determines the output voltage of the CCVS.
- Gain: The proportionality constant between the controlling current and the output voltage is known as the gain of the CCVS.
How it works:
A CCVS typically uses an operational amplifier (op-amp) to amplify the voltage across a resistor that is connected in series with the controlling current. The output voltage of the op-amp is then directly proportional to the current flowing through the resistor.
Applications:
- Amplifiers: CCVS can be used to amplify signals, especially those with high impedance.
- Sensors: CCVS can be used to convert current signals from sensors into proportional voltage signals.
- Control systems: CCVS can be used in control systems to provide a voltage output that is proportional to a measured current.
Examples:
- Transistor Amplifier: A transistor amplifier can be configured as a CCVS, where the base current controls the collector current, and the collector voltage is proportional to the base current.
- Op-amp circuit: An op-amp can be used to create a CCVS with a gain of 1, where the output voltage is equal to the voltage across a resistor connected in series with the controlling current.
