6.30 A very simple circuit for measuring B of an npn transistor is shown in Fig. P6.30. In a particular design, Vec is provided by a 3-V battery; M is a current meter with a 50-µA full scale and relatively low resistance that you can neglect for our purposes here. Assuming that the transistor has VRE = 0.7 V at I = 1 mA, what value of R. would establish a resistor current of I mA? Now, to what value of ß does a meter reading of full scale correspond? What is B if the meter reading is 1/5 of full scale? 1/10 of full scale? Vcc Rc M Fiqure P6.30

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**Transcribed Text:**

6.30 A very simple circuit for measuring β of an npn transistor is shown in Fig. P6.30. In a particular design, V_CC is provided by a 3-V battery; M is a current meter with a 50-μA full scale and relatively low resistance that you can neglect for our purposes here. Assuming that the transistor has V_BE = 0.7 V at I_E = 1 mA, what value of R_C would establish a resistor current of 1 mA? Now, to what value of β does a meter reading of full scale correspond? What is β if the meter reading is 1/5 of full scale? 1/10 of full scale?

**Diagram Explanation:**

- The diagram shows an npn transistor circuit.
- V_CC is the supply voltage, which is 3 V in this case.
- R_C is the collector resistor.
- M represents a current meter connected in series with the collector circuit.
- The npn transistor is connected with its emitter grounded.

This basic circuit is used to measure the current gain (β) of the transistor by observing the current through the collector circuit as indicated by the meter M. The circuit analysis would involve calculating R_C to achieve a specified current, and then using the meter readings to determine the transistor's β at different scales.
Transcribed Image Text:**Transcribed Text:** 6.30 A very simple circuit for measuring β of an npn transistor is shown in Fig. P6.30. In a particular design, V_CC is provided by a 3-V battery; M is a current meter with a 50-μA full scale and relatively low resistance that you can neglect for our purposes here. Assuming that the transistor has V_BE = 0.7 V at I_E = 1 mA, what value of R_C would establish a resistor current of 1 mA? Now, to what value of β does a meter reading of full scale correspond? What is β if the meter reading is 1/5 of full scale? 1/10 of full scale? **Diagram Explanation:** - The diagram shows an npn transistor circuit. - V_CC is the supply voltage, which is 3 V in this case. - R_C is the collector resistor. - M represents a current meter connected in series with the collector circuit. - The npn transistor is connected with its emitter grounded. This basic circuit is used to measure the current gain (β) of the transistor by observing the current through the collector circuit as indicated by the meter M. The circuit analysis would involve calculating R_C to achieve a specified current, and then using the meter readings to determine the transistor's β at different scales.
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