This work introduces a multi-stage CMOS OTA design technique that allows cascading identical gain stages (for arbitrarily scalable high DC gain) while driving an ultra-wide range of capacitive loads ( $\text{C}_{\text {L}}\text{s}$ )....

This open-loop gain enhancement circuit in 1.2pm CMOS does not require cascode or long-channel transistors, thus maximizing output swing and input common-mode range [1,21. Since gain enhancement is achieved not by increasing output resistance, but by matching main and replica amplifiers, high effective open-loop gain is maintained even with resistive loads. This circuit can be used with any tra...

A wideband CMOS variable gain low noise amplifier suitable for multi-standard radio applications between 75 MHz and 3 GHz is presented. Wideband matching to 50 Ohm (single ended) is achieved using a common-drain feedback stage whereas variable gain is realized using a resistive attenuator. The circuit has been designed in a 65 nm CMOS process and achieves 22 dB maximum gain, 29 dB gain range, 3...

Purpose The American Joint Committee on Cancer (AJCC) staging system has been validated for use as a prognostic parameter in uveal melanoma (UM). We studied whether adding information regarding chromosome 3 and 8q status further enhances the prognostic value of this staging system. Methods We retrospectively studied a cohort of 522 patients who had been treated for UM in two different centers...

A high gain, high frequency single stage CMOS op amp is designed and simulated. The authors used gain boosting technique and common mode feedback circuitry on a differential input/ouput 0.5μm CMOS amplifier. Results comprehend a DC gain of 110 dB, a unity-gain frequency superior to 300MHz associated with a phase margin in the range of 60 degrees. Good insensivity to temperature, voltage rail le...

This paper presents a novel data-driven approach to single channel speech enhancement employing Gaussian process (GP). Our approach is based on applying GP regression to estimate the residual gain with the input features being the a priori and a posteriori signal-to-noise ratios (SNRs). The residual gain is defined as the difference between the optimal gain and that obtained from the minimum me...

This paper presents an 8-18GHz wideband receiver with superheterodyne topology. In order to save power, both RF and IF signals share the tunable transconductance stage. The IF output of the first mixer is fed to its tunable input stage for IF amplification in a recursive manner, which significantly enhances the gain tuning without increasing the power. The wideband receiver MMIC is implemented ...

This paper proposes a module of a high gain and high swing 2-stage amplifier. It is suitable for building a general operational amplifier in a modular fashion with various optional performances. The proposed module alone offers opened-loop voltage gain up to 124 dB and GBW of 10 MHz without loading conditions. To assemble a 124 dB voltage gain operational amplifier with load driving capacity of...

DC-offset and DC-suppression are key parameters in bioelectric amplifiers. However, specific DC analyses are not often explained. Several factors influence the DC-budget: the programmable gain, the programmable cut-off frequencies for high pass filtering and, the low cut-off values and the capacitor blocking issues involved. A new intermediate stage is proposed to address the DC problem entirel...

An active-feedback frequency-compensation (AFFC) technique for low-power operational amplifiers is presented in this paper. With an active-feedback mechanism, a high-speed block separates the low-frequency high-gain path and high-frequency signal path such that high gain and wide bandwidth can be achieved simultaneously in the AFFC amplifier. The gain stage in the active-feedback network also r...