An improved reversed miller compensation technique for three‐stage CMOS OTAs with double pole‐zero cancellation and almost single‐pole frequency response

2020 ◽  
Vol 48 (11) ◽  
pp. 1990-2005 ◽  
Author(s):  
Francesco Centurelli ◽  
Pietro Monsurrò ◽  
Giuseppe Scotti ◽  
Pasquale Tommasino ◽  
Alessandro Trifiletti
Keyword(s):  
Frequency Response ◽  
Double Pole ◽  
Miller Compensation ◽  
Compensation Technique

Turbulence Estimation Using Fast-Response Thermistors Attached to a Free-Fall Vertical Microstructure Profiler

2016 ◽  
Vol 33 (10) ◽  
pp. 2065-2078 ◽  
Author(s):  
Yasutaka Goto ◽  
Ichiro Yasuda ◽  
Maki Nagasawa
Keyword(s):  
Temperature Gradient ◽  
Frequency Response ◽  
Turbulence Intensity ◽  
Free Fall ◽  
Fast Response ◽  
Double Pole ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Wide Range ◽  
Low Pass

AbstractEstimation of turbulence intensity with a fast-response thermistor is examined by comparing the energy dissipation rate from a Fastip Probe, model 07 (FP07), thermistor with from a shear probe, both of which are attached to a free-fall microstructure profiler with the fall rate of 0.6–0.7 m s−1. Temperature gradient spectra corrected with previously introduced frequency response functions represented by a single-pole low-pass filter yields with a bias that strongly depends on turbulence intensity. Meanwhile, the correction with the form of a double-pole low-pass filter derives less bias than of single-pole low-pass filter. The rate is compatible with when the double-pole correction with the time constant of 3 × 10−3 s is applied, and 68% of data are within a factor of 2.8 of in the wide range of = 10−10–3 × 10−7 W kg−1. The rate is still compatible with even in the anisotropy range, where the buoyancy Reynolds number is 20–100. Turbulence estimation from the fast-response thermistor is thus confirmed to be valid in this range by applying the appropriate correction to temperature gradient spectra. Measurements with fast-response thermistors, which have not been common because of their poor frequency response, are less sensitive to the vibration of profilers than those with shear probes. Hence, measurements could be available when a fast-response thermistor is attached to a CTD frame or a float, which extends the possibility of obtaining much more turbulence data in deep and wide oceans.

scholarly journals Improved Frequency Compensation Technique for Three-Stage Amplifiers

2021 ◽  
Vol 11 (1) ◽  
pp. 11
Author(s):  
Alejandro Roman Loera ◽  
Anurag Veerabathini ◽  
Luis Alejandro Flores Oropeza ◽  
Luis Antonio Carrillo Martínez ◽  
David Moro Frias
Keyword(s):  
Detailed Comparison ◽  
Cmos Process ◽  
Slew Rate ◽  
Compensation Scheme ◽  
Frequency Compensation ◽  
Output Node ◽  
Miller Compensation ◽  
Compensation Technique ◽  
Simulation Results ◽  
Nested Miller Compensation

Improved frequency compensation is proposed for a three-stage amplifier with reduced total capacitance, improved slew rate, and reduced settling time. The proposed compensation uses an auxiliary feedback to increase the total effective compensation capacitance without loading the output node. The proposed compensation scheme is validated in simulation by implementing a three-stage amplifier driving 10 pF load capacitor in a 0.18 μm CMOS process. A detailed comparison of the compensation with a conventional nested Miller compensation is also presented. The simulation results showed a reduction in total compensation capacitance and improvement in slew rate compared to conventional nested Miller compensation and the other reported techniques in the literature.

SETTLING TIME MINIMIZATION OF THREE-STAGE CROSSED FEEDFORWARD REVERSED NESTED-MILLER AMPLIFIER

2012 ◽  
Vol 21 (07) ◽  
pp. 1250055
Author(s):  
HASSAN RAMEZANNEJAD DIZABADI ◽  
SABER ABBASZADE
Keyword(s):  
Frequency Response ◽  
Power Supply ◽  
Closed Loop ◽  
Cmos Technology ◽  
Settling Time ◽  
Fast Transient Response ◽  
Miller Compensation ◽  
Unit Step ◽  
Compensation Methods ◽  
Time Minimization

Conventional frequency response compensation methods for three-stage amplifier are not appropriate for fast transient response viewpoint. Therefore, herein, we have utilized the minimum settling time (MST) approach to compensate the crossed feed-forward reversed nested Miller compensation (CFRNMC) amplifier which was previously compensated by the conventional frequency response methods. Compensation rules for the considered amplifier are proposed based on time-domain parameters. The three-stage amplifier is designed in a 90 nm CMOS technology with the power supply of 1 V. The amplifier drives the capacitor load of 100 pF and its closed-loop time response to a unit-step input has a settling time less than 34 ns with 1% settling error.

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