Published in Analog Integrated Circuits and Signal Processing
A PVT compensated sub-µA current reference is proposed in this paper. It is based on the summation of a proportional to absolute temperature (PTAT) current with a complementary to absolute temperature current. The current generators are realized using the subthreshold beta multipliers. The PTAT current generator of the proposed current reference be...
Published in Analog Integrated Circuits and Signal Processing
A new application of single-chip gain-selectable amplifiers for Howland current pump circuits is here presented and discussed. LT199x integrated circuits, by Linear Technology, were used for the implementation of extremely accurate voltage-to-current conversion. Circuit performance was evaluated for resistive temperature-sensors biasing and signal ...
Published in Analog Integrated Circuits and Signal Processing
A low-power and wideband low-noise amplifier (LNA) for 77 GHz automobile radar and 94 GHz image radar systems using 90 nm CMOS technology is reported. Half-wavelength (λ/2)-spiral-inductor-based positive feedback technique is used at the common-source input stage for gain (S21) enhancement. Moreover, T-match technique is utilized to achieve simulta...
Published in Analog Integrated Circuits and Signal Processing
A W-band (75–110 GHz) down-conversion mixer with CMOS-inverter-based RF transconductance (GM) stage for 94 GHz image radar sensors in 90 nm CMOS is reported. Due to the current bleeding and GM contribution of the upper PMOS transistors of the RF GM stage, a larger load resistance can be adopted and a larger GM can be obtained while keeps the same l...
Published in Analog Integrated Circuits and Signal Processing
This paper attempts to propose a newly modified method to improve the frequency compensation of three-stage operational trans-conductance amplifiers. In the topology of the new frequency compensation, a current comparator is placed on the feedback path, while the common node of Miller compensation capacitors, the feedforward path, is removed by eli...
Published in Analog Integrated Circuits and Signal Processing
In this work, we demonstrate two low-power and wide-locking-range W-band CMOS divide-by-3 injection-locked frequency dividers (ILFD3) using stacked cross-coupled-transistor topology. The first ILFD3 (ILFD31) uses an on-chip balun to transform the single input signal to differential output signals, which are amplified by the lower cross-coupled tran...
Published in Analog Integrated Circuits and Signal Processing
An efficient-energy switching scheme for a successive approximation register (SAR) analogue-to-digital converter (ADC) is presented. The proposed switching scheme combines a new switching method and the spilt capacitor technique. The new switching method consumes no energy in the first three comparison cycles and introduces negative energy (Tong an...
Published in Analog Integrated Circuits and Signal Processing
A 12bit 250MSPS pipeline analog-to-digital converter (ADC) with serial output interface is presented. The pseudo random digital calibration dithered sub-ADC in first stage is used to lower non-ideal errors and improve the dynamic performance in the high speed ADC. An integrated serial output interface is implemented to convert 12bit parallel data i...
Published in Analog Integrated Circuits and Signal Processing
This paper introduces a ripple-based adaptive on-time controlled buck converter with pseudo triangular ramp compensation. Ripple-based control has its advantages over traditional PWM control of fast response and simple structure without frequency compensation network. Constant on-time (COT) control is one of the conventional ripple-based control me...
Published in Analog Integrated Circuits and Signal Processing
This Paper presents a microstrip lowpass filter (LPF) with compact size, and ultra-wide stopband. The structure consists of a semi-circular shaped resonator (SCSR) and circular patches as the suppressing cell. The proposed LPF has a − 3 dB cutoff frequency at 1.53 GHz. It also has suitable performances such as an extended stopband width from 1.62 t...
