PWM principle 2, modulator design ideas 3, concret

Title: PWM

Category:
SCM
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[WORD]
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60kb
Update:
2012-11-26
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tanweiwen07

Description: PWM principle 2, modulator design ideas 3, concrete realization of the design 1, PWM (Pulse Width Modulation Pulse Width Modulation) principle: Pulse-width modulation wave is usually a rectangular pulse duty cycle of different composition, its duty cycle and the signal is proportional to the instantaneous sampling value. Figure 1 shows the pulse-width modulation system block diagram and waveform diagram. The system has a comparator and a cycle composed of Ts of the sawtooth generator. If the voice signal is greater than sawtooth signal, the comparator output of the normal number of A, otherwise output 0. Thus, as can be seen from Figure 1, the comparator output a falling edge pulse width modulation wave modulation

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