Digital Pulse Modulation

2021 ◽  
pp. 257-277
Author(s):  
M.L. Anand
Keyword(s):  
Pulse Modulation ◽  
Digital Pulse

Demonstration of digital pulse modulation of a grating-surface-emitting diode laser

1990 ◽  
Vol 26 (20) ◽  
pp. 1695
Author(s):  
N.W. Carlson ◽  
D.R. Patterson ◽  
P.J. Stabile ◽  
S.K. Liew ◽  
D.P. Bour ◽  
...  
Keyword(s):  
Diode Laser ◽  
Pulse Modulation ◽  
Digital Pulse

scholarly journals Dynamic and Static Calibration of Ultra-Low-Voltage, Digital-Based Operational Transconductance Amplifiers

Electronics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 983 ◽  
Author(s):  
Pedro Toledo ◽  
Paolo Crovetti ◽  
Hamilton Klimach ◽  
Sergio Bampi
Keyword(s):  
Pulse Width Modulation ◽  
Low Voltage ◽  
Process Variations ◽  
Pulse Modulation ◽  
Silicon Area ◽  
Operational Transconductance Amplifiers ◽  
Static Calibration ◽  
Digital Pulse ◽  
Transconductance Amplifiers ◽  
The Impact

The calibration of the effects of process variations and device mismatch in Ultra Low Voltage (ULV) Digital-Based Operational Transconductance Amplifiers (DB-OTAs) is addressed in this paper. For this purpose, two dynamic calibration techniques, intended to dynamically vary the effective strength of critical gates by different modulation strategies, i.e., Digital Pulse Width Modulation (DPWM) and Dyadic Digital Pulse Modulation (DDPM), are explored and compared to classic static calibration. The effectiveness of the calibration approaches as a mean to recover acceptable performance in non-functional samples is verified by Monte-Carlo (MC) post-layout simulations performed on a 300 mV power supply, nW-power DB-OTA in 180 nm CMOS. Based on the same MC post-layout simulations, the impact of each calibration strategy on silicon area, power consumption, and OTA performance is discussed.

Design of H-Bridge Class-D Power Amplifiers for Digital Pulse Modulation Transmitters

2007 ◽  
Vol 55 (12) ◽  
pp. 2845-2855 ◽  
Author(s):  
Tsai-Pi Hung ◽  
Jeremy Rode ◽  
Lawrence E. Larson ◽  
Peter M. Asbeck
Keyword(s):  
Power Amplifiers ◽  
Pulse Modulation ◽  
Class D ◽  
Digital Pulse

Study on a New Type of HVDC Flexible Digital Pulse Width Modulated Carrier Frequency Selection

2015 ◽  
Vol 740 ◽  
pp. 503-506
Author(s):  
Qing Liang Qin
Keyword(s):  
Carrier Frequency ◽  
Control Method ◽  
Digital Signal ◽  
Sine Wave ◽  
Control Signal ◽  
Frequency Change ◽  
Pulse Modulation ◽  
Frequency Selection ◽  
Analog To Digital Conversion ◽  
Digital Pulse

For multi_level multi_module in the flexible HVDC converter (MMC) module capacitor control algorithm is commonly based on nearest voltage level modulation (NLM), this algorithm requires the decimal part of the input sine wave for analog-to-digital conversion by digital signal (digital pulse modulation, referred to as DPWM),in the choice of hysteretic DPWM control signal is better, if the input triangle carrier wave frequency selection is not good, in each digital signal level will cause the output frequency of DPWM is not stable, some DPWM frequency is too high, and some DPWM has no output. In order to solve this problem, to meet the requirements of control precision, the carrier frequency change DPWM triangular wave, the output ideal control signal, the output control signal is analyzed, put forward how to carry out DPWM frequency selection. Through the simulation certified the feasibility of this method, the control method of downloading to the field programmable gate array (FPGA) chip, the results of the actual control operation show that this method can optimize the control of flexible HVDC.

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