Design of a Cyclic Self-Triggered DPWM for Resolution Extension

In many industrial applications such as motors, robots, and inverters, a digital pulse width modulation (DPWM) device is an important component. However, for extending its resolution, the conventional counter-based DPWM requires a higher reference clock frequency in proportion to its resolution bits. This paper proposes a DPWM device that uses a cyclic self-trigger of a monostable multivibrator to extend its resolution without increasing the reference clock frequency. Moreover, it maintains a low hardware complexity similar to the conventional counter-based DPWM.

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