Active Current Mirrors for Low-Voltage Analog Circuit Design

Miguez, Matías; Gak, Joel; Oliva, Alejandro; Arnaud, Alfredo

doi:10.1007/s00034-017-0650-2

Cited by 7 publications

(2 citation statements)

References 10 publications

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“…It should be highlighted that when V In > V Ref , the FB loop is established regardless of whether the transistor M 1 is in weak, moderate, or strong inversion or even in the linear zone behaving as a resistor; the situation is analogous to the active current mirrors presented in Miguez et al 19 where the circuit theory is discussed in detail. When V In < V Ref instead, a FB loop is not possible because G m cannot set V GS1 to a point where I 1 < 0.…”

Section: A Novel 10 Na Precision Rectifiermentioning

confidence: 91%

Nano–power‐integrated precision rectifiers for implantable medical devices

Alvarez

Arnaud

Gak

et al. 2020

Circuit Theory & Apps

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Summary Two ultralow power CMOS full‐wave precision rectifiers aimed at analog signal processing in implantable medical devices are presented. The rectifiers require no diodes and utilize a single or two transconductors (operational transconductance amplifier [OTA]) as the active element, to reduce power consumption to a minimum. First, a voltage‐to‐current rectifier consuming only a 120‐nA supply current is presented and later is used to estimate the average AC amplitude of a piezoelectric accelerometer output (0.5–15‐Hz bandwidth) in an adaptive pacemaker. This rectifier is based on a linearized transconductor and a comparator to toggle the output current sign. Then, a novel voltage rectifier consuming less than 10 nA is presented based on a single nanopower OTA and a pass transistor and later is utilized in a pacemaker's cardiac sensing channel (60–200‐Hz bandwidth) circuit, incorporating the rectifier to detect positive and negative voltage signal spikes. Both rectifiers were designed in a 0.6‐μm CMOS technology, fabricated, and tested, and the measurement results closely fit the expected performance.

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Section: A Novel 10 Na Precision Rectifiermentioning

confidence: 91%

Nano–power‐integrated precision rectifiers for implantable medical devices

Alvarez

Arnaud

Gak

et al. 2020

Circuit Theory & Apps

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“…The high dynamic response of a high-voltage amplifier [8,10] can help improve the stick-slip velocity when applied to stick-slip driving. Therefore, designing a high-voltage amplifier with a high dynamic response is of great benefit for stick-slip driving [9,17,18]. Several voltage amplifiers have been proposed to drive piezoelectric actuators.…”

Section: Introductionmentioning

confidence: 99%

High-Voltage Amplifier with High Dynamic Response for Stick–Slip Driving

Zhang

Zhong

Zeng

et al. 2019

Circuits Syst Signal Process

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Stick-slip driving is widely applied because it provides a nearly infinite range of motion with sub-micron resolution, but its movement velocity is impacted by the dynamic response of high-voltage amplifiers. Therefore, this paper presents a highvoltage amplifier with a high dynamic response specific to stick-slip driving. Considering the capacitive load characteristic of stick-slip driving, an analog amplification circuit is designed to realize a high output voltage, and then a gate driving optimization method is proposed to improve the dynamic response performance of the amplifier. To verify the high dynamic characteristic of the voltage amplifier, an experimental system was built to test the dynamic response performance of the amplifier by monitoring the output voltage. The experimental results show that the gate driving optimization method improved the dynamic response performance by more than 10 times, and the amplifier can output an high dynamic voltage signal up to 150 V when driving a capacitive load of 0.5 μF.

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