Faxin Yu
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View article: A 5–18 GHz Four-Channel Multifunction Chip Using 3D Heterogeneous Integration of GaAs pHEMT and Si-CMOS
A 5–18 GHz Four-Channel Multifunction Chip Using 3D Heterogeneous Integration of GaAs pHEMT and Si-CMOS Open
Compact, broadband, multi-channel RF chips with low loss and high integration are required for high-performance phased-array systems. Presented in this paper is a four-channel, multifunction RF chip operating in the 5–18 GHz frequency rang…
View article: Bayesian Distributed Target Detectors in Compound-Gaussian Clutter Against Subspace Interference with Limited Training Data
Bayesian Distributed Target Detectors in Compound-Gaussian Clutter Against Subspace Interference with Limited Training Data Open
In this article, the problem of Bayesian detecting rank-one distributed targets under subspace interference and compound Gaussian clutter with inverse Gaussian texture is investigated. Due to the clutter heterogeneity, the training data ma…
View article: CktGen: Specification-Conditioned Analog Circuit Generation
CktGen: Specification-Conditioned Analog Circuit Generation Open
Automatic synthesis of analog circuits presents significant challenges. Existing methods usually treat the task as optimization problems, which limits their transferability and reusability for new requirements. To address this limitation, …
View article: A Wideband Hybrid Envelope Tracking Supply Modulator with Slew-Rate-Enhanced Linear Amplifier
A Wideband Hybrid Envelope Tracking Supply Modulator with Slew-Rate-Enhanced Linear Amplifier Open
A wideband hybrid envelope tracking supply modulator (HETSM) with a slew-rate-enhanced linear amplifier (LA) is described in this work. The proposed slew-rate enhancement (SRE) structure introduces a parallel auxiliary current path directl…
View article: A Hybrid Scheme for TX I/Q Imbalance Self-Calibration in a Direct-Conversion Transceiver
A Hybrid Scheme for TX I/Q Imbalance Self-Calibration in a Direct-Conversion Transceiver Open
A generic transmitter (TX) I/Q imbalance self-calibration method, which was designed based on a hybrid analog and digital structure, is proposed in this paper. The whole calibration scheme was implemented using low-complexity digital–analo…
View article: A TLRTV Dual-Band SAR Image Denoise–Fusion Strategy and its Preliminary Experimental Analysis in Multiband Airborne Radar System
A TLRTV Dual-Band SAR Image Denoise–Fusion Strategy and its Preliminary Experimental Analysis in Multiband Airborne Radar System Open
Multiband synthetic aperture radar (SAR) image fusion combines the scattering characteristics of targets from different bands to provide a comprehensive and informative output. However, the conventional SAR denoise and fusion separation fr…
View article: A Frequency-Domain I/Q Imbalance Calibration Algorithm for Wideband Direct Conversion Receivers Using Low-Cost Compensator
A Frequency-Domain I/Q Imbalance Calibration Algorithm for Wideband Direct Conversion Receivers Using Low-Cost Compensator Open
The amplitude and phase imbalances of the in-phase (I) and quadrature (Q) branches inherent in the direct conversion receiver structure cause the generation of image frequency interference signals. In this paper, a frequency-domain I/Q imb…
View article: A Machine Learning Approach for the Forecasting of Computing Resource Requirements in Integrated Circuit Simulation
A Machine Learning Approach for the Forecasting of Computing Resource Requirements in Integrated Circuit Simulation Open
For the iterative development of the chip, ensuring that the simulation is completed in the shortest time is critical. To meet this demand, the common practice is to reduce simulation time by providing more computing resources. However, th…
View article: A parasitic elimination bootstrapped switch and a fast settling residual amplifier for high-speed and high-resolution pipelined ADC
A parasitic elimination bootstrapped switch and a fast settling residual amplifier for high-speed and high-resolution pipelined ADC Open
This letter proposes a parasitic elimination bootstrapped switch and a fast settling residual amplifier to be used in multiplying digital-to-analog converter (MDAC) in order to improve the performance of pipelined ADC at high frequency. Th…
View article: High-Linearity Direct Conversion Receiver with the Transconductance Equalization Technique and DCOC Method
High-Linearity Direct Conversion Receiver with the Transconductance Equalization Technique and DCOC Method Open
To improve the linearity of direct conversion receivers (DCRs), two high-linearity methods for high second-order intercept points (IP2s) and high third-order intercept points (IP3s) are proposed. To improve IP3s, a transconductance equaliz…
View article: A sigma-delta modulator with residual offset suppression
A sigma-delta modulator with residual offset suppression Open
This Letter presents a low-residual-offset second-order sigma-delta modulator. By inserting a chopper working at low frequency to the mirrored integrator at the first stage of the modulator, the original residual offset is transferred to a…
View article: A 14bit 500MS/s 85.62dBc SFDR 66.29dB SNDR SHA-less pipelined ADC with a stable and high-linearity input buffer and aperture-error calibration in 40nm CMOS
A 14bit 500MS/s 85.62dBc SFDR 66.29dB SNDR SHA-less pipelined ADC with a stable and high-linearity input buffer and aperture-error calibration in 40nm CMOS Open
This paper presents a 14bit 500MS/s SHA-less pipelined analog-to-digital converter (ADC) implemented in 40nm CMOS. A high-linearity pseudo-differential push-pull input buffer with an anti-oscillation technique and a nonlinear parasitism el…
View article: A 92 fs<sub>rms</sub> jitter frequency synthesizer based on a multicore class-C voltage-controlled oscillator with digital automatic amplitude control
A 92 fs<sub>rms</sub> jitter frequency synthesizer based on a multicore class-C voltage-controlled oscillator with digital automatic amplitude control Open
This letter presents a frequency synthesizer based on a multicore Class-C voltage-controlled oscillator (VCO) with a digital automatic amplitude control (AAC) loop. A novel digital tail current estimation is adopted to mitigate the risks o…
View article: A Blind Calibration Model for I/Q Imbalances of Wideband Zero-IF Receivers
A Blind Calibration Model for I/Q Imbalances of Wideband Zero-IF Receivers Open
Frequency-dependent I/Q imbalance and frequency-independent I/Q imbalance are the major impairments in wideband zero-IF receivers, and they both cannot be ignored. In this paper, a blind calibration model is designed for compensating these…
View article: A highly linear 10 Gb/s MOS current mode logic driver with large output voltage swing based on an active inductor
A highly linear 10 Gb/s MOS current mode logic driver with large output voltage swing based on an active inductor Open
This letter proposes a MOS-current-mode-logic (MCML) driver with an active inductor structure to provide large voltage swing with linear response. This design is implemented in 45 nm CMOS with 1.2V supply. Compared with conventional active…
View article: An effective DC offset calibration method combined with analog and digital circuits for direct conversion receivers
An effective DC offset calibration method combined with analog and digital circuits for direct conversion receivers Open
This paper presents a DC offset calibration (DCOC) method combined with analog and digital circuits for direct conversion receivers. To work effectively, the LNA is shut off for better isolation and replaced by an equivalent resistance to …
View article: MMIC on-Wafer Test Method Based on Hybrid Balanced and Unbalanced RF Pad Structures
MMIC on-Wafer Test Method Based on Hybrid Balanced and Unbalanced RF Pad Structures Open
Nowadays, more and more MMICs (Microwave Monolithic Integrated Circuit), such as limiters and switches, are designed to have balanced and unbalanced test pad structures to solve the challenging size restrictions and integration requirement…
View article: All-in-One Wafer-Level Solution for MMIC Automatic Testing
All-in-One Wafer-Level Solution for MMIC Automatic Testing Open
In this paper, we present an all-in-one wafer-level solution for MMIC (monolithic microwave integrated circuit) automatic testing. The OSL (open short load) two tier de-embedding, the calibration verification model, the accurate PAE (power…
View article: A New Digital to Analog Converter Based on Low-Offset Bandgap Reference
A New Digital to Analog Converter Based on Low-Offset Bandgap Reference Open
This paper presents a new 12-bit digital to analog converter (DAC) circuit based on a low-offset bandgap reference (BGR) circuit with two cascade transistor structure and two self-contained feedback low-offset operational amplifiers to red…