At 25degc z1 is a 68-v zener diode with a tc of 2 mvdegc, Other Engineering

At 25degc z1 is a 68-v zener diode with a tc of 2 mvdegc

Consider the thermal shutdown circuit shown in Fig. At 25°C, Z1 is a 6.8-V zener diode with a TC of 2 mV/°C, and Q1 and Q2 are BJTs that display VBE of 0.7 V at a current of 100μA and have a TC of -2 mV/C. Design the circuit so that at 125°C, a current of 200μA flows in each of Q1 and Q2. What is the current in Q2 at 25°C?

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Other Engineering: At 25degc z1 is a 68-v zener diode with a tc of 2 mvdegc

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Other Engineering: At 25degc z1 is a 68-v zener diode with a tc of 2 mvdegc

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