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a) Design a BJT base drive circuit with the following configuration that has a spike of 2 A at turn-on and maintains a base current of 0.4 A in the on state. The valtage v; is a pulse of O to 12 V with a 50% duty ratio, and the switching frequency is 120 kHz. Assume that V,, is 0.8 V when the transistor is on. The time constant T= 1µs. Load R, R:

a) Design a BJT base drive circuit with the following configuration that has a spike of 2 A at turn-on and maintains a base current of 0.4 A in the on state. The valtage v; is a pulse of O to 12 V with a 50% duty ratio, and the switching frequency is 120 kHz. Assume that V,, is 0.8 V when the transistor is on. The time constant T= 1µs. Load R, R:

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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a) Design a BJT base drive circuit with the following configuration that has a spike of 2 A at turn-on and maintains a base current of 0.4 A in the on state. The vatage V¡ is a pulse of O to 12 V with a 50% duty ratio, and the switching frequency is 120 kHz. Assume that V. is 0.8 V when the transistor is on. The tirne constant T = 1µs. Load R: b) Thyristor snubber circuits can be like those used for the transistor, or they may be of the unpolarized type. What is the role of the inductance L, and the parallel RC circuit ? ミ4, Figure 19.19 Thyristor snubbe circuit.
Transcribed Image Text:a) Design a BJT base drive circuit with the following configuration that has a spike of 2 A at turn-on and maintains a base current of 0.4 A in the on state. The vatage V¡ is a pulse of O to 12 V with a 50% duty ratio, and the switching frequency is 120 kHz. Assume that V. is 0.8 V when the transistor is on. The tirne constant T = 1µs. Load R: b) Thyristor snubber circuits can be like those used for the transistor, or they may be of the unpolarized type. What is the role of the inductance L, and the parallel RC circuit ? ミ4, Figure 19.19 Thyristor snubbe circuit.
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