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Li, J., Qiu, Y., Sun, Y., Huang, B. and Xu, M. (2007) High Resolution Digital Duty Cycle Modulation Schemes for Voltage Regulators. Proceeding of the IEEE Applied Power Electronics Conference and Exposition (APEC’07), Anaheim, 25 February-1 March 2007, 871-876.
http://dx.doi.org/10.1109/apex.2007.357617

has been cited by the following article:

• TITLE: FPGA-Based High-Frequency Digital Pulse Width Modulator Architecture for DC-DC Converters

  AUTHORS: V. Radhika, K. Baskaran

  KEYWORDS: Gray Code Encoding Scheme, High Frequency DPWM, Mealy Finite State Machine, One Hot Encoding Scheme

  JOURNAL NAME: Circuits and Systems, Vol.7 No.4, April 29, 2016

  ABSTRACT: Digital pulse width modulator is an integral part in digitally controlled Direct Current to Direct Current (DC-DC) converter utilized in modern portable devices. This paper presents a new Digital Pulse Width Modulator (DPWM) architecture for DC-DC converter using mealy finite state machine with gray code encoding scheme and one hot encoding method to derive the variable duty cycle Pulse Width Modulation (PWM) signal without varying the clock frequency. To verify the proposed DPWM technique, the architecture with control input of six, five and four bits are implemented and the maximum operating frequency along with power consumption results is obtained for different Field Programmable Gate Array (FPGA) devices. The post layout timing results are presented showing that architecture can work with maximum frequency of 326 MHz and derive PWM signal of 3.59 MHz. Experimental results show the implementation of the proposed architecture in low-cost FPGA (Spartan 3A) with on-board oscillator clock frequency of 12 MHz which is multiplied internally by two with Digital Clock Manager (DCM) and derive the PWM signal of 1.5 MHz with a time resolution of 1 ps.