Hybrid LBDD PWM modulator for digital class-BD audio amplifier based on STM32F407VGT6 microcontroller and analog DLL

Jasielski, Jacek; Kuta, S.; Kolodziejski, Wojciech; Machowski, W.

doi:10.1109/mixdes.2015.7208585

Cited by 3 publications

(6 citation statements)

References 12 publications

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“…Jasielski investigated the LBDD PWM hybrid modulator for BD-class digital audio amplifier based on the STM32F407VGT6 microcontroller and analog DLL. A new architecture and implementation of the 9-bit hybrid LBDD PWM modulator for Class-BD digital audio amplifiers had been proposed [17]. Ravi Kumar studied a microprocessorbased closed-loop speed control on DC motors using PWM.…”

Section: Khan Designed and Manufactured Digital Mosfet-basedmentioning

confidence: 99%

Control System for Adjusting the Brightness Level with PWM Technique Using Visual Net Microcontroller-Based

Setiawan¹,

Ishak²,

Sembiring³

2020

jrc

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A lamp is an artificial source of light produced by channeling electric current through the filament, which then heats up and produces light. Eye health experts believe that the ideal brightness of a lamp depends on ambient light. The rule must ensure that the brightness of the lights must be equivalent to the light around because, in that way, the light from the lights and surroundings will blend, and the eyes do not need to work harder. To overcome the problem, a control system was created by implementing the pulse width modulation (PWM) technique to control the brightness of the lights manually using a visual net application. Utilization of a microcontroller as a control center in controlling the brightness level of the lamp using the type of microcontroller AVR16, by displaying the PWM value on a form, designed on the visual net. Thus, it needed to set the level of light brightness to be ideal in the desired conditions.

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Section: Khan Designed and Manufactured Digital Mosfet-basedmentioning

confidence: 99%

Control System for Adjusting the Brightness Level with PWM Technique Using Visual Net Microcontroller-Based

Setiawan¹,

Ishak²,

Sembiring³

2020

jrc

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“…The essential limitation of the digital-to-time converter (DTC), which converts obtained from the noise shaping process N rq -bit positions of the leading and trailing edges of the PWM pulse within each n-th switching period into a physical sequence of 1-bit modulated PWM pulses is excessive clock speed. The DTC with N rq -bit resolution, based on counter method in downcounting mode, requires clock frequency [15][16][17]: ( 7 ) giving time resolution of generated pulse: Consequently to assure N rq -bit resolution, DTC processing error must be smaller than ( ) delay cells, additional and variable delay introduced by each path connecting delay line tap with appropriate multiplexer's input as well some other factors like Process, Voltage and Temperature (PVT) variations and different mismatches result in nonlinearity of the quantizer. However linear characteristic with evenly distributed steps can be achieved for low resolution of the converter, when delay line is formed of small number of the delay cells, closed in feedback loop of the DLL [12][13][14][15][16].…”

Section: System Clock Selection and Architecture Of The Proposed 9-bimentioning

confidence: 99%

“…Integration of both afore-described methods into a hybrid DTC allows a trade-off between the high-frequency clock requirement and quantization linearity of the digital to time conversion [13][14][15][16].…”

Section: System Clock Selection and Architecture Of The Proposed 9-bimentioning

confidence: 99%

“…Practically, even for a requantized resolution N rq -bit of the digital output, a required clock frequency CLK f is too high to implement the DCT, therefore to circumvent the high-frequency clock problem a hybrid DCT is used [11][12][13][14][15][16][17], which integrates the counter method and a method based on the tapped delay line.…”

Section: Introductionmentioning

confidence: 99%

“…Model of noise shaping architectureEven for moderate resolution (exceeding 8 bits), simple counter method needs excessive clock speeds.Most often, to moderate an excessive requirement of high clock frequency, instead of simple counter method, the hybrid method is used[14][15][16]. The hybrid quantizer converts the data of most significant bits (MSB) [(N rq -1) : m] using counter method, while the remaining part of least significant bits (LSB) quantizer system based on the programmable tapped delay line (PTDL).Hybrid N rq -bit LADD modulator, processing the data of (N rq -m) MSB bits on the base counter method, requires clock frequency quantizer processing the data of LSB (2:0) bits comprises a cascade of m 2 identical delay segments, at the same time the delay introduced by single segment equals[12][13][14][15][16][17]:…”

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Hybrid Linearized Class-BD Double Sided (LBDD) Digital Pulse Width Modulator (DPWM) for Class-BD Audio Amplifiers

2017

Self Cite

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The paper presents an original architecture and implementation of 9-bit LBDD hybrid DPWM circuit for Class-BD digital audio amplifier. The input PCM signals are directly transformed into 24-bit LBDD DPWM signals and then are requanized to the 9-bit digital outputs using noise-shaping process to support high fidelity with practical values of time resolution, and finally are converted by the DTCs into the two physical trains of 1-bit PWM signals. The architecture of the proposed Class-BD hybrid DPWM circuit is composed of two Class-AD ones. The hybrid quantizer converts 6 MSB bits using counter method, based on the STM32F407xx microcontroller, while the remaining 3 LSB bits - using a method based on the Programmable Tapped Delay Line (PTDL). All necessary time waveforms are generated on the base of the internal microcontroller oscillator 168 MHz. The proposed 9-bit Class-DB DPWM circuit allows to attain SNR of 110 dB and THD about 0,2% within the audio baseband, at switching frequency of 328.1 kHz, clock frequency of 42 MHz and modulation index M = 0.95. Basic verification of algorithm and circuit operation as well as simulation and preliminary experimental results have been performed.

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Cloud-based IoT Platform DC-DC Power Converter (Non-Ideal)

AlJandal¹,

AlRasheed²,

Jamal³

2021

IJRTE

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This paper describes a modularized smart system architecture which is integrated with Internet of Thing (IoT) into the DC-DC converters to build a programmable technique to leverage machine learning algorithms to predict possible future faults to the system. In addition, it facilitates the performance optimization of the boost converter. This system can be established with low computing hardware to simulates the control behavior and data-driven method of IoT-based, due to the unreliability initiated from the integration of IoT technology and power electronic converters. In response to these challenges, the current paper addresses a scientific approach using small signal analysis of dc-dc boost converter (non-Ideal) with closed loop control to analyze the small deviations or abnormalities in transient region and the steady-state operating point. Complete state-space analysis is done to obtain output voltage using pulse width modulation techniques for boosting the voltage of the input voltage to a higher level by momentarily storing and release the energy in the conductor. The model of the converter is designed and simulated using voltage mode controlling method. Digital implementation based on Arduino platform was implemented to compensate perturbations of sudden load variation either on voltage or current loads. A Simulation study is conducted to validate the result of the step-up dc-dc converter using MATLAB.

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Hybrid LBDD PWM modulator for digital class-BD audio amplifier based on STM32F407VGT6 microcontroller and analog DLL

Cited by 3 publications

References 12 publications

Control System for Adjusting the Brightness Level with PWM Technique Using Visual Net Microcontroller-Based

Control System for Adjusting the Brightness Level with PWM Technique Using Visual Net Microcontroller-Based

Hybrid Linearized Class-BD Double Sided (LBDD) Digital Pulse Width Modulator (DPWM) for Class-BD Audio Amplifiers

Cloud-based IoT Platform DC-DC Power Converter (Non-Ideal)

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