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AN2282 - Analog - Resonant Bridge Oscillators for Piezoelectric Buzzers | サイプレス セミコンダクタ

AN2282 - Analog - Resonant Bridge Oscillators for Piezoelectric Buzzers

最終更新日: 
2020 年 6 月 26 日
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This Application Note shows an example of a piezoelectric resonator with an excitation throughout its frequency range using the PSoC® 1 device. This technique allows the user to obtain the maximum output power for a given supply voltage. The oscillators have no CPU overhead during operation.

はじめに

Piezoelectric buzzers are widely used in various embedded systems including alarm systems, vending machines, kiosks, access control devices, entertainment systems, home appliances, and medical equipment. In most cases, only a 3.0- to 5.0-volt supply is available, which makes it more difficult to obtain a loud audio signal because piezoelectric materials usually require higher operating voltages. Combining a bridge buzzer together with resonant frequency excitation renders higher power supply voltage usage and increases the generated sound pressure level.

Piezobuzzer





サンプルプロジェクト
サポートされているハードウェアとソフトウェア サポートされているPSoC 1デバイス
PSoC Designerバージョン ハードウェアキット CY8C20xxx CY8C21xxx CY8C22xxx CY8C23xxx CY8C24xxx CY8C27xxx CY8C28xxx CY8C29xxx
はい 5.4 CY3210-PSoCEVAL1         x23A, 794 x43   x66