The output resistance of CB transistor is given by _________a)∆V...
The ratio of change in collector base voltage (∆VCB) to resulting change in collector current (∆IC) at constant emitter current (IE) is defined as output resistance. This is denoted by ro.
View all questions of this testThe output resistance of CB transistor is given by _________a)∆V...
Output Resistance of CB Transistor - Explanation
The output resistance of a Common Base (CB) transistor configuration is given by VCB/ICB, where VCB is the voltage across the collector and base terminals, and ICB is the collector current.
Explanation:
1. Common Base (CB) Configuration:
- The Common Base configuration is one of the three basic transistor configurations, along with Common Emitter (CE) and Common Collector (CC) configurations.
- In the CB configuration, the base terminal is common to both the input and output, while the emitter is the input and the collector is the output.
2. Output Resistance:
- The output resistance of a transistor configuration refers to the resistance offered by the transistor at its output terminal. It determines the ability of the transistor to deliver a stable output voltage or current.
3. Calculation of Output Resistance (RCB):
- The output resistance of the CB transistor configuration is given by the ratio of the voltage across the collector and base terminals (VCB) to the collector current (ICB), i.e., RCB = VCB/ICB.
- The voltage across the collector and base terminals (VCB) is the potential difference between the collector and base terminals, and it is typically measured when the transistor is operating in its active region.
- The collector current (ICB) is the current flowing through the collector terminal of the transistor.
4. Significance of Output Resistance in CB Configuration:
- The output resistance of the CB configuration determines the stability and linearity of the transistor as an amplifier.
- A higher output resistance implies a more stable and linear behavior of the transistor, as it reduces the impact of load variations on the output voltage or current.
- The output resistance also affects the gain and bandwidth of the transistor amplifier.
Conclusion:
The output resistance of a Common Base (CB) transistor configuration is given by VCB/ICB, where VCB is the voltage across the collector and base terminals, and ICB is the collector current. This output resistance determines the stability and linearity of the transistor as an amplifier and affects its gain and bandwidth.