The new multifin approach for mitigation of leakage in an Operational Transconductance Amplifier
01 Nov 2015-pp 334-338
TL;DR: In this paper, the authors presented the design and analysis of conventional Operational Transconductance Amplifier for use in novel FinFET based OTA, which had fixed bias voltage at 0.7µA and supply voltage is 0.5V.
Abstract: In this paper presents the design and analysis of Conventional Operational Transconductance Amplifier for use in novel FinFET based OTA. OTA is an analog circuit and it has differential input voltage controlled current source (VCCS). OTA is a basic building block in analog circuit. In this, paper we focus on different-different supply voltage to find such type parameter like leakage power, integrated noise, leakage current, power consumption. The proposed design using FinFET has enhanced the performance parameter of the conventional OTA design. By using, novel FinFET OTA we reduce power consumption 1.024mW.The proposed OTA (implemented with FINFET) had fixed bias voltage at 0.7µA and supply voltage is 0.7V. The design and simulation of FINFET based OTA is done by using 45nm technology at cadence virtuoso version 6.1 platforms.
References
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03 May 1993
TL;DR: A low-voltage two-stage operational amplifier (op-amp) is presented that features rail-to-rail operation and has an input stage with a constant transconductance (g/sub m/) over the entire common-mode input range.
Abstract: A low-voltage two-stage operational amplifier (op-amp) is presented. The op-amp features rail-to-rail operation and has an input stage with a constant transconductance (g/sub m/) over the entire common-mode input range. The input stage consists of an n- and a p-MOS differential pair connected in parallel. The constant g/sub m/ is accomplished by regulating the tail-currents with the aid of an MOS translinear (MTL) circuit. The resulting g/sub m/ is constant within 5%. The common-source output stage employs a feedback circuit which also contains an MTL circuit. This feedback circuit ensures class AB operation and prevents the transistors in the output stage from cutting off. The op-amp isi realized in a semi-custom CMOS process with minimum channel lengths of 10/spl mu/m. Simulations show that the minimum supply voltage is less than 2.5 V. A unity gain bandwidth of 550 kHz and a DC voltage gain larger than 80 dB are feasible. The input range exceeds the supply rails, whereas the output range reaches the rails within 130 mV. >
49 citations
TL;DR: Using the open-loop damping factor as a design parameter, the presented method delivers robust settling performance of a third-order system in the presence of process and component variation.
Abstract: This paper presents an open-loop design method for fast-settling three-stage class-A amplifiers. Specifically, using the open-loop damping factor as a design parameter, the presented method delivers robust settling performance of a third-order system in the presence of process and component variation. As an illustration of the proposed approach, we show Spice simulation results of a nested-Miller-compensated three-stage-amplifier designed in 0.35-μm CMOS technology. The design achieves a 1% and 0.1% dynamic-error settling times of 6.4 ns and 13.7 ns, respectively, at a gain-bandwidth product of 55 MHz and a dynamic range of 80 dB, while consuming 5.4 mW from a 3-V supply.
46 citations
TL;DR: A circuit implementing the full signal conditioning of a piezoelectric accelerometer for adaptive pacemakers is presented, as an application example of the proposed OTA combining both source and bulk degeneration to achieve an increased linear range above 1 V.
Abstract: In this paper, a study of bulk degeneration in a differential pair to enhance its linear range is initially conducted. A nanopower operational transconductance amplifier (OTA) is then proposed combining both source and bulk degeneration to achieve an increased linear range above 1 V with a power supply ranging from 1.9 V to 5.5 V. The circuit was fabricated in a 0.6 μm technology and measured. This linearity improvement is achieved with a negligible increase in power consumption, noise, and input referred offset. Finally a circuit implementing the full signal conditioning of a piezoelectric accelerometer for adaptive pacemakers is presented, as an application example of the proposed OTA. The circuit consumes only 500 nA, and it can discriminate signals of 15 μV, because of the low input referred offset <; 5 mV of the source-bulk linearized OTA.
38 citations
"The new multifin approach for mitig..." refers methods in this paper
...By using bulk degeneration technique we have a tendency to improved dimensionality and input offset voltage of OTA[9]....
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TL;DR: In this paper, a low-voltage CMOS operational transconductance amplifier (OTA) with linear output current versus input voltage relationship is presented for differential input voltage range extended from rail to rail.
Abstract: This paper describes a novel circuit design technique for a low-voltage CMOS operational transconductance amplifier (OTA) where the output current versus the input voltage relationship is linear for differential input voltage range extended from rail to rail. The input transconducting CMOS transistors operate in the nonsaturation region. A pair of complementary n-type input OTAN and p-type OTAP circuits in conjunction with n-MOS and p-MOS output current mirrors are connected in parallel to implement the rail-to-rail voltage input and push-pull current output. The transconductances g/sub mn/ and g/sub mp/ of the OTAN and the OTAP are tuned by biasing voltages VDSN and VDSP, respectively. A masterbias generator (with VDSP as input) is used to generate VDSN as output so as to satisfy g/sub mn/=g/sub mp/. The circuit is capable of operating at supply voltage larger than two times the MOS transistor threshold voltage V/sub T/. When the supply voltage is 2 V and the MOS transistor threshold voltage is 0.7 V, using SPICE level-3 2 /spl mu/m CMOS technology device parameters, the simulation result of the output current deviation from perfect linearity is less than 0.3% for rail-to-rail differential input voltage range.
23 citations
"The new multifin approach for mitig..." refers methods in this paper
...By designing the circuit at single and differential rail to rail topology the performance of the circuit is observed and with different approach it is used in different 978-1-S090-00S1-7I1S/$31.00©20 IS IEEE DOl 10.1109/ICCN.201S.63 334 application [4]....
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TL;DR: A low-power process-independent programmable transconductance rail-to-rail operational amplifier (OpAmp) is proposed that employs an improved transc conductance feedback loop that senses the transconductances accurately and enforces it to be equal to the conductance of a reference resistor.
Abstract: A low-power process-independent programmable transconductance rail-to-rail operational amplifier (OpAmp) is proposed. It employs an improved transconductance feedback loop that senses the transconductance (gmT) accurately and enforces it to be equal to the conductance of a reference resistor. Experimental results in a 0.13- μm standard CMOS technology under a 1-V power supply demonstrate a continuous programmable gmT range from 87 to 165 μA/V with minimum fluctuation of ±2.4% and programmable deviation less than 4.5% from the reference value. The OpAmp achieves a unity-gain bandwidth of 3.7 MHz with a 95-pF load while only consuming 187 μA of quiescent current. The figure of merit of the proposed OpAmp is 1879 MHz·pF/mA.
21 citations