A 9–11-Bit Phase-Interpolating Digital Pulsewidth Modulator With 1000x Frequency Range.
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| Title: | A 9–11-Bit Phase-Interpolating Digital Pulsewidth Modulator With 1000x Frequency Range. |
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| Authors: | Lee, Yoontaek, Kang, Taewook, Kim, Jaeha |
| Source: | IEEE Transactions on Industry Applications. Jul2015, Vol. 51 Issue 4, p3376-3384. 9p. |
| Subjects: | Pulse width modulation, Digital counters, Interpolation, Digital-to-analog converters, Energy consumption, Relaxation oscillators, Integrated circuits, Metal oxide semiconductors |
| Abstract: | A design of a new hybrid-type digital pulsewidth modulator (DPWM) with a wide frequency range of 1000 : 1, from 10 kHz to 10 MHz, is presented. The proposed DPWM has the maximum duty-cycle resolution of 11 bits and consumes the power of 17.5 \mu\mboxW at 10 kHz and 2.36 mW at 10 MHz, respectively. The proposed DPWM realizes the upper 5-bit resolution using a programmable digital counter and the lower 6-bit resolution using a current-integrating-type phase interpolator, employing an M2M-ladder current-steering digital-to-analog converter for low power consumption. The operating clock is generated in on-chip using a relaxation oscillator. The prototype integrated circuit fabricated in a 0.25- \mu\mboxm high-voltage complementary metal–oxide–semiconductor demonstrates that the proposed DPWM maintains a good linearity across the entire operating range. [ABSTRACT FROM PUBLISHER] |
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| Database: | Engineering Source |
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