A Novel Feedforward Technique for Improved Line Transient in Time-Based-Controlled Boost Converters

Melillo, Paolo; Dago, Alessandro; Gasparini, Alessandro; Levantino, Salvatore; Ghioni, M.

doi:10.1109/prime55000.2022.9816834

Cited by 3 publications

(8 citation statements)

References 8 publications

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“…As a result, the two zeros can be made either purely imaginary or real-valued with one zero in the right half-plane (RHP) and one in the left half-plane (LHP). The imaginary zeros are obtained by summing the two inputs as done with the notch filter in (12). Similarly, the realvalued zeros are obtained by applying the inverted current to one of the inputs, as done for the shelf filter in (13).…”

Section: Time-based Second-order Filtersmentioning

confidence: 99%

“…Figure 14 shows the notch filter (12) with a damping ratio of 𝜁 = 1. For this filter, the damping ratio determines the width of the notch and, thus, how concentrated the attenuation should be.…”

Section: Time-based Second-order Filtersmentioning

confidence: 99%

“…The lack of large passive components makes time-based systems appealing for integrated circuits due to their better scaling with process nodes and the removed size penalty from capacitors. Integrated time-based circuits have already proved their functionality in many applications, such as Op-Amps [4]- [6], time-based filters [7]- [11], and time-based control [12]- [15].…”

Section: Introductionmentioning

confidence: 99%

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Time-Based High-Pass, Low-Pass, Shelf, and Notch Filters

Dahl,

Muntal,

Andersen

2023

ELEKTRON ELEKTROTECH

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This paper presents formulations for time-based first-order and second-order high-pass, shelf, and notch filters. These formulations are an extension to the existing literature where low-pass filters are already developed using a multiphase controlled oscillator in conjunction with a phase detector and charge pump. The presented high-pass filter expands the circuit by introducing a current-controlled delay line (CCDL) that provides a direct path from input to output. By combining the high-pass filter with the low-pass filter, we show that shelf and notch filters can be obtained without an increase in circuit complexity compared to the high-pass filter. The results show good matching between the ideal small signal and the simulated time-based large signal frequency response. The simulated of total harmonic distortion for the filters shows an increase in distortion due to the nonlinearities introduced by the CCDL for the high-pass, notch, and shelf filter compared to the existing low-pass filter. The derivation of the new filter types allows the creation of complex high-order time-based filters by combining multiple first- or second-order filters.

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Section: Time-based Second-order Filtersmentioning

confidence: 99%

Section: Time-based Second-order Filtersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Time-Based High-Pass, Low-Pass, Shelf, and Notch Filters

Dahl,

Muntal,

Andersen

2023

ELEKTRON ELEKTROTECH

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“…Another application for time-based systems are time-based control, that has been used for integrated Buck and Boost power converters where PI and PID controllers have been designed [11][12][13][14][15][16][17][18]. These controllers generate the proportional and integral gain in the time-based domain using current controlled delay lines (CCDL) for proportional gain and current controlled oscillators (CCO) as integrators.…”

Section: Introductionmentioning

confidence: 99%

“…Fig. 1 shows a typical time-based PID controller in a buck converter similar to the implementations in [11,[14][15][16][17][18]. This paper proposes a new time-based PID structure that utilizes the operating variable, time, in the form of a delay as an additional control parameter.…”

Section: Introductionmentioning

confidence: 99%

Fully Time-Based PID Controller for a High Frequency Buck Converter

Dahl,

Muntal,

Andersen

2023

2023 21st IEEE Interregional NEWCAS Conference (NEWCAS)

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With the shrinkage of process nodes for integrated circuits, analog circuits, like analog feedback control, have become increasingly expensive and more challenging to design. Here timebased control is a compelling alternative to traditional analog feedback control circuits due to its better scaling with the process node. Several publications about time-based PID-type controllers exist. There the PI-part is implemented in the time domain, but the D-part remains in the analog domain thereby limiting the process scaling benefits. This paper proposes a new PID structure that fully integrates the PID in the time domain. The proposed structure has improved ripple attenuation and maps directly to a typical PID. Simulations shows that the performance of the theoretical small signal controller translates well to the large signal time-based response.

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