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Suppose that we are designing a cardiac pacemaker circuit.

Electrical Engineering: Principles & Applications | 6th Edition | ISBN: 9780133116649 | Authors: Allan R. Hambley ISBN: 9780133116649 150

Solution for problem P3.25 Chapter 3

Electrical Engineering: Principles & Applications | 6th Edition

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Electrical Engineering: Principles & Applications | 6th Edition | ISBN: 9780133116649 | Authors: Allan R. Hambley

Electrical Engineering: Principles & Applications | 6th Edition

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Problem P3.25

Suppose that we are designing a cardiac pacemaker circuit. The circuit is required to deliver pulses of 1-ms duration to the heart, which can be modeled as a 500- resistance. The peak amplitude of the pulses is required to be 5 V. However, the battery delivers only 2.5 V. Therefore, we decide to charge two equal-value capacitors in parallel from the 2.5-V battery and then switch the capacitors in series with the heart during the 1-ms pulse. What is the minimum value of the capacitances required so the output pulse amplitude remains between 4.9 V and 5.0 V throughout its 1-ms duration? If the pulses occur once every second, what is the average current drain from the battery? Use approximate calculations, assuming constant current during the output pulse. Find the ampere-hour rating of the battery so it lasts for five years.

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Post Lab 7: BJT Common­Emitter Circuit Voltage Gain Proposal: This experiment is designed to illustrate how the voltage gain of a CE bipolar transistor circuit can be changed by changing the bias of the circuit and by changing the values of the resistors in the circuit. Experimental Procedure: For the experiment you will require:  1 NPN transistor, either 2N3904, 2N2222, or equivalent  1 Curve tracer  1 Decade resistance box  NI-ELVIS workstation  Resistors and capacitors as noted in the schematic.  Linear graph paper or graphing software (e.g., Excel or MatLab). For part I: Establishing the proper Q-point (1),Use the curve tracer and measure the β of the transistor at a collector current of about 1.0mA and VCE of about 5 V. Set I MAX= 20 ma, V MAX= 10V,

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Chapter 3, Problem P3.25 is Solved
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Textbook: Electrical Engineering: Principles & Applications
Edition: 6
Author: Allan R. Hambley
ISBN: 9780133116649

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Suppose that we are designing a cardiac pacemaker circuit.