Low power high-gain class-AB OTA with dynamic output current scaling
نویسندگان
چکیده
A high-performance operational transconductance amplifier (OTA) is proposed. In order to increase DC gain, gain bandwidth, and the slew rate under low standby quiescent current, the proposed OTA has the dynamic output current scaling and class AB operation. Under the condition of 250 A quiescent current and a 30 pF load capacitance with a step voltage from 1.2 to 1.5V at a rise time of 1 nsec in a unit gain configuration, HSPICE simulation results are presented to show a higher DC gain, gain bandwidth and slew rate than conventional OTAs.
منابع مشابه
A Novel ±0.5V Ultra High Current Drive and Output Voltage Headroom Current Output Stage with Very High Output Impedance
A novel ultra-high compliance, low power, very accurate and high output impedance current output stage (COS) with extremely high output current drive capability is proposed in this paper. The principle of operation of this unique structure is discussed, its most important formulas are derived and its outstanding performance is verified by HSPICE simulation in TSMC 0.18µm CMOS, BSIM3, and Level4...
متن کاملA Cmos Class-ab Transconductance Amplifier for Switched-capacitor Applications
A novel CMOS operational transconductance amplifier (OTA) is presented, using a fully differential singlestage core OTA as input stage and a differential to single current converter as output stage, each biased at a separate current level. A large gain-bandwidth (GBW) product (2.7 MHz) and a high slew-rate (5 V//.LS) can be obtained by applying a large bias current to the core OTA. Due to the c...
متن کاملA 0.8-V, 8-μW, CMOS OTA with 50-dB Gain and 1.2-MHz GBW in 18-pF Load
A low-power low-voltage OTA with rail-to-rail output is introduced. The proposed topology is based on the common current mirror OTA topology and provide gain enhancement without extra power consumption. Implemented in a standard 0.25μm CMOS technology, the proposed OTA achieves 50 dB DC gain in 0.8 V supply voltage. The GBW is 1.2MHz and the static power consumption is 8μW while driving 18pF lo...
متن کاملA New Low-Voltage, Low-Power and High-Slew Rate CMOS Unity-Gain Buffer
Class-AB circuits, which are able to deal with currents several orders of magnitude larger than their quiescent current, are good candidates for low-power and high slew-rate analog design. This paper presents a novel topology of a class AB flipped voltage follower (FVF) that has better slew rate and the same power consumption as the conventional class-AB FVF buffer previously presented in liter...
متن کاملNew low-voltage class AB current conveyor II for analog applications
Current conveyors are unity gain active elements exhibiting high linearity, wide dynamic range and high frequency performance than their voltage mode counterparts. The new current conveyor operating at low-voltage supplies high input impedance and low output impedance and consumes less power. In this study, a new low-voltage class AB second generation current conveyor (AB CCII) is presented whi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- IEICE Electronic Express
دوره 10 شماره
صفحات -
تاریخ انتشار 2013