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I am working on a project to generate PWM signal with PIC32MX460F512L to drive a motor. I have written the code to drive a motor with a signal of frequency 10KHz. I have tried to test my code but it is not work. I would appreciate of someone can advice me one how to proceed.
#include <plib.h>...
I am trying to solve the attached question. Please I would appreciate if some one can check my approach and tell me if I am correct and how can I proceed in getting h0(t)
Here is the approach.
INPUT STAGE: Q111 and Q112
Av1 = Rtot/2re, where Rtot is the total resistance of R117 and the input resistance of Q78 which is Rin.
So the gain Av = Rtot/500 ohms. If hFE for Q78 is 250, Rin = hFE*(R115+re) = 250(155) = 38750 ohms.
So Rtot = R117||Rin = 14441ohms =...
The Approach in #33 is how it is done in the book I mentioned in #32. I have attached here the scanned page
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The attached pages shows the analysis of a similar circuit from the book:Designing Audio Power Amplifiers by Bob Gordell
Calculating Output Impedance:
Considering the output stage, For Q94, IE = 10mA, so re = 2.5 ohms. Making total emitter resistance Rtot3= R117 + re = 68 ohms + 2.5 ohms = 70.5 ohms = 70 ohms. But both halves are in parallel, so output impedance Zout = 70 || 70 = 35 ohms
This is how I...
I got the idea I used in the calculation above from the book: Designing Audio Power Amplifiers by Bob Gordell, Pages 44 to 48. It is well explained there but my problem how how the value of the load is selected.
Here is the approach.
For the first stage: Av1 = Rtot/2re, where Rtot is the total resistance of R117 and the input resistance of Q78 which is Rin.
So the gain Av = Rtot/500 ohms. If hFE for Q78 is 250, Rin = hFE*(R115+re) = 250(155) = 38750 ohms.
So Rtot = R117//Rin = 14441ohms = 14000 ohms...
I am really lost on how to continue. These are the questions I have to answer:
(1) Ground HRI- and HRI+. Calculate the operating currents on all transistors and the open loop output impedance at 1kHz. (2) Calculate the open loop differential gain of the circuit (connect input signal between...
I want to calculate the open loop differential gain of the circuit assuming that HRI- and HRI+ are grounded.
My approach is to calculate the gain in the input stage (Q111 and Q112), the gain in the stage including (Q78 and Q114) and the gain in the output stage (Q94 and Q126) and multiply all...
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