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A resistive load of 4 ohms is matched to the collector impedance of an amplifier by means of a transformer having a turn ratio of 40:1. The amplifier uses a DC supply voltage of 12V in the absence of input signal. When signal is present at the base, the collector voltage swings between 22V and 2V, while the collector current swings between 0.9A and 0.05A. Determine: (a) the collector impedance                    (b) Signal power output                    (c) DC power input

A resistive load of 4 ohms is matched to the collector impedance of an amplifier by means of a transformer having a turn ratio of 40:1. The amplifier uses a DC supply voltage of 12V in the absence of input signal. When signal is present at the base, the collector voltage swings between 22V and 2V, while the collector current swings between 0.9A and 0.05A. Determine: (a) the collector impedance                    (b) Signal power output                    (c) DC power input

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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A resistive load of 4 ohms is matched to the collector impedance of an amplifier by means of a transformer having a turn ratio of 40:1. The amplifier uses a DC supply voltage of 12V in the absence of input signal. When signal is present at the base, the collector voltage swings between 22V and 2V, while the collector current swings between 0.9A and 0.05A.

Determine: (a) the collector impedance

                   (b) Signal power output

                   (c) DC power input

                   (d) Collector efficiency

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