Topic
Current sense amplifier
About: Current sense amplifier is a research topic. Over the lifetime, 2727 publications have been published within this topic receiving 38124 citations.
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01 Jan 2008
TL;DR: In this article, the authors compare MOST and Bipolar transistor models, including Amplifiers, Source followers, and Cascodes, with differentially voltage and current amplifiers.
Abstract: Comparison of MOST and Bipolar transistor models.- Amplifiers, Source followers & Cascodes.- Differential Voltage and Current amplifiers.- Noise performance of elementary transistor stages.- Stability of Operational amplifiers.- Systematic Design of Operational Amplifiers.- Important opamp configurations.- Fully-differential amplifiers.- Design of Multistage Operational amplifiers.- Current-input Operational Amplifiers.- Rail-to-rail input and output amplifiers.- Class AB and driver amplifiers.- Feedback Voltage and Transconductance Amplifiers.- Feedback Transimpedance and Current Amplifiers.- Offset and CMRR: Random and systematic.- Bandgap and current reference circuits.- Switched-capacitor filters.- Distortion in elementary transistor circuits.- Continuous-time filters.- CMOS ADC and DAC principles.- Low-power Sigma-Delta AD converters.- Design of crystal oscillators.- Low-noise amplifiers.- Coupling effects in Mixed analog-digital ICs.
563 citations
TL;DR: In this paper, a two-stage CMOS operational amplifier is proposed to provide stable operation for a much larger range of capacitive loads, as well as much improved V/SUB BB/ power supply rejection over very wide bandwidths for the same basic operational amplifier circuit.
Abstract: The commonly used two-stage CMOS operational amplifier suffers from two basic performance limitations due to the RC compensation network around the second gain stage. First, it provides stable operation for only a limited range of capacitive loads, and second, the power supply rejection shows severe degradation above the open-loop pole frequency. The technique described provides stable operation for a much larger range of capacitive loads, as well as much improved V/SUB BB/ power supply rejection over very wide bandwidths for the same basic operational amplifier circuit. The author presents a mathematical analysis of this new technique in terms of its frequency and noise characteristics followed by its implementation in all n-well CMOS process. Experimental results show 70-dB negative power supply rejection at 100 kHz and an input noise density of 58 nV/(Hz)/SUP 1/2/ at 1 kHz.
521 citations
Book•
01 Mar 1980
TL;DR: In this paper, the authors present an overview of the radio communication system, including the following components: Small-Signal High-Frequency Amplifiers, Linear Power Amplifiers and Tuned Power Amplifier.
Abstract: Radio Communication Systems. Electrical Noise. Resonant Circuits and Impedance Transformation. Small--Signal High--Frequency Amplifiers. Sinewave Oscillators. Phase--Locked Loops. Mixers. Modulation. Amplitude Modulation Receivers. FM and PM Receivers. Television Receivers. Linear Power Amplifiers. Tuned Power Amplifiers. High--Efficiency Power Amplifiers. CW, FN, and AM Transmitters. Single--Sideband Transmitters. Index.
520 citations
TL;DR: In this paper, an overview of current design techniques for operational amplifiers implemented in CMOS and NMOS technology at a tutorial level is presented, focusing on CMOS amplifiers because of their more widespread use.
Abstract: Presents an overview of current design techniques for operational amplifiers implemented in CMOS and NMOS technology at a tutorial level. Primary emphasis is placed on CMOS amplifiers because of their more widespread use. Factors affecting voltage gain, input noise, offsets, common mode and power supply rejection, power dissipation, and transient response are considered for the traditional bipolar-derived two-stage architecture. Alternative circuit approaches for optimization of particular performance aspects are summarized, and examples are given.
493 citations
01 Jan 2009
TL;DR: Advantages of Class E are unusually high efficiency, a priori designability, large reduction in second-breakdown stress, low sensitivityy to activedevice characteristics, and potential for high-efficiency operation at higher frequencies than pI eviously published Class-D circuits.
Abstract: The previous literature on tuned power amplifiers has not made clear the fundamental differences between amplifiers in which the output device acts 1) as a current source, or 2) as a switch. Previous circuits have often operated in contradiction to their design assumptions, resulting in the need for “cut-and-try” design. The new class of amplifiers deseribed here is based on a load network synthesized to hWe a transient response which maximizes power efficiency even if the active device switching times are substantial fractions of the ac cycle. The new class of amplifiers, named “Class E; 1 is defined and is iflustnated by a detailed description and a set of design equations for one simple member of the class. For that circuit the authors measured 96 percent transistor efficiency at 3.9 MHr at 26-W output from a pair of Motorola 2N3735 TO-5 transistors. Advantages of Class E are unusually high efficiency, a priori designability, large reduction in second-breakdown stress, low sensitivityy to activedevice characteristics, and potential for high-efficiency operation at higher frequencies than pI eviously published Class-D circuits. Harmonic output and power gain are comparable to those of conventional amplifiers.
468 citations