ZHCSMS9J September 1973 – February 2025 NA555 , NE555 , SA555 , SE555
PRODUCTION DATA
請(qǐng)參考 PDF 數(shù)據(jù)表獲取器件具體的封裝圖。
The operation of the timer can be modified by modulating the internal threshold and trigger voltages, which is accomplished by applying an external voltage (or current) to CONT. Figure 7-3 shows a circuit for pulse-width modulation. A continuous input pulse train triggers the monostable circuit, and a control signal modulates the threshold voltage. Figure 7-4 shows the resulting output pulse-width modulation. While a sine-wave modulation signal is shown, any wave shape can be used.
Figure 7-3 Circuit for Pulse-Width Modulation