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This paper introduces a multi-loop fast transient response flipped voltage follower (FVF) low-dropout (LDO) voltage regulator suitable for system-on-chip (SOC) applications. While typical FVF-based LDOs exhibit fast transient response, which is critical for SOC applications, their output DC accuracy is limited due to low loop gain of the FVF. In this work, we introduce a multi-loop design aimed at...
This paper proposes a lag-lead Active Voltage Positioning (AVP) technique that can be used in buck converters to minimize their output voltage transients during dynamic events, such as load pulses. The proposed technique is based on optimizing the output impedance of the converter across a wide range of frequencies, and therefore, output voltage transients in response to both narrow and wide load...
Low-dropout voltage regulators (LDOs) have been extensively used on-chip to supply voltage for various circuit blocks. Digital LDOs (DLDO) have recently attracted circuit designers for their low voltage operating capability and load current scalability. Existing DLDO techniques suffer from either poor transient performance due to slow digital control loop or poor DC load regulation due to low loop...
Transient faults continue to be a critical concern in a range of computing domains including: High-Performance Computing (HPC), scientific computing, and the automotive industry. While radiation-induced faults have been well studied and understood in microprocessors, their impact on computations on Graphic Processing Units (GPU) has received less attention. GPUs are now being used in a large number...
This paper presents a detailed noise and non-linearity analysis of a 10-bit 1.2Vppd 50MS/s charge-injection based SAR-ADC designed in a 65 nm low power process. Being more area-efficient in contrast to a conventional capacitor DAC, a charge-injection-cell-based DAC allows to reuse its DAC cells during binary search. Based on extensive calculations and transistorlevel simulations, the charge-injection...
This work presents the design of a high-bandwidth and high slew rate class-AB amplifier in a linear assisted hybrid converter for envelope tracking (ET) applications. ET has become prevalent for improving the efficiency of RF power amplifiers (PA) in portable devices when transmitting LTE signals. The class-AB amplifier in the hybrid converter provides the AC power to the PA, whereas the DC power...
The current work proposes a method and circuitry for a lightning strike detection system with current and vibration detecting features. A Rogowski coil is used for current detection, which can be placed around a conductor where the lightning current is expected to flow. The method also provides means of ascertaining which tower is closest during the moment of the strike through use of a dual-axis...
A controlled comparison of three compensation techniques — nested Miller compensation (NMC), Split-Length compensation (SLC) and the new Split-Transistor compensation (STC) — is performed in a multi-stage low-dropout voltage regulator (LDO). The LDO with STC used 41% and 84% lower total compensation capacitance compared to the LDOs with SLC and NMC, respectively. To verify the proposed compensation...
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