A Signal and Offset T&amp;H Frontend for Spinning Hall Sensors with Ping-Pong and Chopping Techniques

Li, Yongjia; Motz, Mario; Raghavan, Leneesh

doi:10.1109/esscirc.2018.8494293

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…A Hall sensor is isolated in nature but suffers from magnetic interference, thermal drift and limited bandwidth. 21,22) A giant magneto-resistive (GMR) sensor has limited bandwidth as well. 23) A shunt resistor and analogto-digital converter (ADC)-less isolation amplifier provides wide-band current sensing and galvanic isolation at the same time, but the extra power is dissipated at the shunt resistor.…”

Section: Introductionmentioning

confidence: 99%

Cascoded GaN half-bridge with 17 MHz wide-band galvanically isolated current sensor

Majima

Ishiga

Ikeuchi

et al. 2022

Jpn. J. Appl. Phys.

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A cascoded GaN half-bridge with wide-band galvanically isolated current sensor is proposed. A 650-V depletion-mode GaN FET is switched by a low-propagation-delay gate driver in active-mode. The standby and active modes are switched by a 25-V N-ch LDMOS. The current sensor uses the LDMOS as a shunt resistor, gm-cell-based sense amplifier and mixer based isolation amplifier for wider bandwidth. PVT variations of on-resistance of the current-detecting MOSFET are compensated using a reference MOSFET. A digital calibration loop across the isolation is formed to keep the current sensor gain constant within ±1.5% across the whole temperature range. The wide-band current sensor can measure power device switching current. In this study, a cascoded GaN half-bridge switching and inductor current sensing using low-side and high-side device current are demonstrated. The proposed techniques show the possibility of implementing a GaN half-bridge module with isolated current sensor in a package.

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Section: Introductionmentioning

confidence: 99%

Cascoded GaN half-bridge with 17 MHz wide-band galvanically isolated current sensor

Majima

Ishiga

Ikeuchi

et al. 2022

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Current sensors are crucial in many power circuits: they are used for feedback control, overcurrent detection (OCD) and other functionalities [1]. The modern trend in power electronics (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…2-a) and surrounded by a p-well connected to ground. These contacts are grouped as bias contacts (B, T, L, R) and sense contacts (1,2,3,4). Bias contacts are large sized to minimize the contact resistance while sense contacts are designed as small as possible to minimize the parasitic capacitance.…”

Section: Introductionmentioning

confidence: 99%