TRIANGULAR-WAVE GENERATING CIRCUIT, AND PWM CIRCUIT

TRIANGULAR-WAVE GENERATING CIRCUIT, AND PWM CIRCUIT

PROBLEM TO BE SOLVED: To prevent blunting of the waveform of triangular waves in a comparatively high oscillation frequency regarding an oscillation circuit outputting two triangular waves having the same amplitude and inverted phase and a PWM circuit using the oscillation circuit. SOLUTION: A capac...

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1. Verfasser: KUME TOMOHIRO
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Sprache:eng
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AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
PULSE TECHNIQUE
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creator KUME TOMOHIRO
description PROBLEM TO BE SOLVED: To prevent blunting of the waveform of triangular waves in a comparatively high oscillation frequency regarding an oscillation circuit outputting two triangular waves having the same amplitude and inverted phase and a PWM circuit using the oscillation circuit. SOLUTION: A capacity 3 is charged and discharged by a charge pump circuit 2 controlled by a Schmitt circuit 1, and a voltage integrated by a two-output differential amplifier 6 is fed back positively to an input to the Schmitt circuit 1, thus outputting two triangular waves having the same amplitude and the inverted phase. A triangular-wave generating circuit has no effect of wiring capacity and input capacity connected because the output stage is of low-output impedance being composed of the differential amplifier, and the blunting of triangular waves is prevented for integrally operating the differential amplifier. COPYRIGHT: (C)2008,JPO&INPIT
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SOLUTION: A capacity 3 is charged and discharged by a charge pump circuit 2 controlled by a Schmitt circuit 1, and a voltage integrated by a two-output differential amplifier 6 is fed back positively to an input to the Schmitt circuit 1, thus outputting two triangular waves having the same amplitude and the inverted phase. A triangular-wave generating circuit has no effect of wiring capacity and input capacity connected because the output stage is of low-output impedance being composed of the differential amplifier, and the blunting of triangular waves is prevented for integrally operating the differential amplifier. 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BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
PULSE TECHNIQUE
title TRIANGULAR-WAVE GENERATING CIRCUIT, AND PWM CIRCUIT
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