A Low Noise, Wide Dynamic Range Pre-amplifier with Automatic Gain Control for SDH/SONET (STM4/OC12) in 0.6 μm CMOS Process

2007 ◽  
Author(s):  
Peng Han ◽  
Zhi-Gong Wang
Keyword(s):  
Dynamic Range ◽  
Automatic Gain Control ◽  
Gain Control ◽  
Low Noise ◽  
Cmos Process ◽  
Wide Dynamic Range

scholarly journals 14.85 µW Analog Front-End for Photoplethysmography Acquisition with 142-dBΩ Gain and 64.2-pArms Noise

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 512
Author(s):  
Binghui Lin ◽  
Mohamed Atef ◽  
Guoxing Wang
Keyword(s):  
Dynamic Range ◽  
Automatic Gain Control ◽  
Gain Control ◽  
Low Noise ◽  
Total Power ◽  
Cmos Process ◽  
Control Block ◽  
Silicon Area ◽  
Front End ◽  
Analog Front End

A low-power, high-gain, and low-noise analog front-end (AFE) for wearable photoplethysmography (PPG) acquisition systems is designed and fabricated in a 0.35 μm CMOS process. A high transimpedance gain of 142 dBΩ and a low input-referred noise of only 64.2 pArms was achieved. A Sub-Hz filter was integrated using a pseudo resistor, resulting in a small silicon area. To mitigate the saturation problem caused by background light (BGL), a BGL cancellation loop and a new simple automatic gain control block are used to enhance the dynamic range and improve the linearity of the AFE. The measurement results show that a DC photocurrent component up-to-10 μA can be rejected and the PPG output swing can reach 1.42 Vpp at THD < 1%. The chip consumes a total power of 14.85 μW using a single 3.3-V power supply. In this work, the small area and efficiently integrated blocks were used to implement the PPG AFE and the silicon area is minimized to 0.8 mm × 0.8 mm.

An Optimized Design Strategy for the Hardware Implementation of the Hearing Aid Algorithms

2015 ◽  
Vol 719-720 ◽  
pp. 548-553
Author(s):  
Feng Guo ◽  
Shan Shan Yong ◽  
Zhao Yang Guo ◽  
Xin An Wang ◽  
Guo Xin Zhang
Keyword(s):  
Hardware Implementation ◽  
Dynamic Range ◽  
Automatic Gain Control ◽  
Hearing Aid ◽  
Gain Control ◽  
Design Strategy ◽  
Optimized Design ◽  
Wide Dynamic Range ◽  
Dynamic Range Compression ◽  
The Common

In this paper, a new design strategy for the hardware implementation of hearing aid algorithms is proposed. Two familiar hearing aid algorithms—Wide Dynamic Range Compression (WDRC) and Automatic Gain Control (AGC)—are implemented in one circuit as an example. By putting the common arithmetic procedures into common module, the operation units can be used repeatedly. In this way, the area and power consumption are visibly reduced.

scholarly journals A 23-GHZ BANDWIDTH AUTOMATIC GAIN CONTROL AMPLIFIER WITH WIDE DYNAMIC RANGE FOR HIGH SPEED COMMUNICATION

2013 ◽  
Vol 142 ◽  
pp. 261-273
Author(s):  
Bo Zhang ◽  
Yong-Zhong Xiong ◽  
Lei Wang ◽  
Sanming Hu ◽  
Joshua Le-Wei Li
Keyword(s):  
High Speed ◽  
Dynamic Range ◽  
Automatic Gain Control ◽  
Gain Control ◽  
Wide Dynamic Range

Systems. An Analog High-Performance Transfer-Stabilized Fiber-Optic Transmission System for Baseband Video Signals

1984 ◽  
Vol 5 (3) ◽  
Author(s):  
L. P. de Jong ◽  
E. H. Nordholt
Keyword(s):  
High Performance ◽  
Dynamic Range ◽  
Automatic Gain Control ◽  
Low Cost ◽  
Gain Control ◽  
High Dynamic Range ◽  
Optical Signal ◽  
Transmission System ◽  
Low Noise ◽  
Noise Current

SummaryA low-cost video baseband transmission system using analog light-intensity modulation with an 850 nm LED compensated for nonlinearity is presented. A very low- noise current amplifier at the input of the receiver and a high-dynamic range automatic gain control provide a transmission system that can accomodate more than a 20 dB difference in optical losses without any adjustment. At the receiver input, a 100 nW (- 40 dBm) optical signal is required for surveillance transmission quality. The transmitter delivers an optical signal power of - 18 dBm to a 50 pm graded-index fiber. The differential gain and phase of the system lie below 2% and 1°, respectively.

scholarly journals Expanding Bias-instability of MEMS Silicon Oscillating Accelerometer Utilizing AC Polarization and Self-Compensation

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1455
Author(s):  
Yang Zhao ◽  
Guoming Xia ◽  
Qin Shi ◽  
Anping Qiu
Keyword(s):  
Dynamic Range ◽  
Automatic Gain Control ◽  
Gain Control ◽  
Micro Electro Mechanical System ◽  
Low Noise ◽  
Experimental Result ◽  
Front End ◽  
Compensation Technique ◽  
Bias Instability ◽  
Gate Size

This paper presents a MEMS (Micro-Electro-Mechanical System) Silicon Oscillating Accelerometer (SOA) with AC (alternating current) polarization to expand its bias-instability limited by the up-converted 1/f noise from front-end transimpedance amplifier (TIA). In contrast to the conventional DC (direct current) scheme, AC polarization breaks the trade-off between input transistor gate size and white noise floor of TIA, a relative low input loading capacitance can be implemented for low noise consideration. Besides, a self-compensation technique combining polarization source and reference in automatic-gain-control (AGC) is put forward. It cancels the 1/f noise and drift introduced by the polarization source itself, which applies to both DC and AC polarization cases. The experimental result indicates the proposed AC polarization and self-compensation strategy expand the bias-instability of studied SOA from 2.58 μg to 0.51 μg with a full scale of ± 30 g, a 155.6 dB dynamic range is realized in this work.

2.5 Gbit/s Optical Receiver Front-End Circuit with High Sensitivity and Wide Dynamic Range

2017 ◽  
Vol 38 (4) ◽  
Author(s):  
Tiezhu Zhu ◽  
Taishan Mo ◽  
Tianchun Ye
Keyword(s):  
Dynamic Range ◽  
Automatic Gain Control ◽  
Optical Network ◽  
Gain Control ◽  
High Sensitivity ◽  
Cmos Technology ◽  
Optical Receiver ◽  
Passive Optical Network ◽  
Wide Dynamic Range ◽  
Front End

AbstractAn optical receiver front-end circuit is designed for passive optical network and fabricated in a 0.18 um CMOS technology. The whole circuit consists of a transimpedance amplifier (TIA), a single-ended to differential amplifier and an output driver. The TIA employs a cascode stage as the input stage and auxiliary amplifier to reduce the miller effect. Current injecting technique is employed to enlarge the input transistor’s transconductance, optimize the noise performance and overcome the lack of voltage headroom. To achieve a wide dynamic range, an automatic gain control circuit with self-adaptive function is proposed. Experiment results show an optical sensitivity of –28 dBm for a bit error rate of 10

Variable recovery time circuit for use with wide dynamic range automatic gain control for hearing aid

1993 ◽  
Vol 93 (2) ◽  
pp. 1217-1217
Author(s):  
Mead C. Killion ◽  
Harry Teder ◽  
Arthur C. Johnson ◽  
Steven P. Hanke
Keyword(s):  
Recovery Time ◽  
Dynamic Range ◽  
Automatic Gain Control ◽  
Hearing Aid ◽  
Gain Control ◽  
Wide Dynamic Range

A Low-Noise, Low-Power, Wide Dynamic Range Logarithmic Amplifier for Biomedical Applications

2018 ◽  
Vol 27 (07) ◽  
pp. 1850104 ◽  
Author(s):  
Yuwadee Sundarasaradula ◽  
Apinunt Thanachayanont
Keyword(s):  
Low Power ◽  
Biomedical Applications ◽  
Dynamic Range ◽  
Supply Voltage ◽  
Low Noise ◽  
Power Supply Voltage ◽  
Wide Dynamic Range ◽  
Dc Offset ◽  
Limiting Amplifier ◽  
Logarithmic Amplifier

This paper presents the design and realization of a low-noise, low-power, wide dynamic range CMOS logarithmic amplifier for biomedical applications. The proposed amplifier is based on the true piecewise linear function by using progressive-compression parallel-summation architecture. A DC offset cancellation feedback loop is used to prevent output saturation and deteriorated input sensitivity from inherent DC offset voltages. The proposed logarithmic amplifier was designed and fabricated in a standard 0.18[Formula: see text][Formula: see text]m CMOS technology. The prototype chip includes six limiting amplifier stages and an on-chip bias generator, occupying a die area of 0.027[Formula: see text]mm2. The overall circuit consumes 9.75[Formula: see text][Formula: see text]W from a single 1.5[Formula: see text]V power supply voltage. Measured results showed that the prototype logarithmic amplifier exhibited an 80[Formula: see text]dB input dynamic range (from 10[Formula: see text][Formula: see text]V to 100[Formula: see text]mV), a bandwidth of 4[Formula: see text]Hz–10[Formula: see text]kHz, and a total input-referred noise of 5.52[Formula: see text][Formula: see text]V.

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