Exponential current pulse generation for efficient very high-impedance multisite stimulation

S Ethier, M Sawan - IEEE transactions on biomedical circuits …, 2010 - ieeexplore.ieee.org
We describe in this paper an intracortical current-pulse generator for high-impedance
microstimulation. This dual-chip system features a stimuli generator and a high-voltage …

Realization of PVT Independent Current‐Mode CMOS Exponential Circuit

MM Abouelezz, MA Al‐Absi - International Journal of Circuit …, 2024 - Wiley Online Library
This paper presents a CMOS current‐mode exponential circuit using CMOS technology. The
design is insensitive to process, voltage, and temperature (PVT). The circuit is based on the …

Low-voltage CMOS current-mode exponential circuit with 70 dB output dynamic range

CR Popa - Microelectronics Journal, 2013 - Elsevier
The paper proposes new accurate exponential circuits, having a multitude of practical
applications in analog signal processing. The original method for obtaining the exponential …

Simple CMOS current-mode exponential function generator circuit

M Kumngern, J Chanwutitum… - 2008 5th international …, 2008 - ieeexplore.ieee.org
A low-power and low-voltage simple CMOS exponential function generator circuit is
proposed. It is based on simple current mirrors able to operate at low supply voltage. The …

A high power efficient multi-waveform current stimulator used in implantable neural stimulation

FB Mooziraji, O Shoaei - Analog Integrated Circuits and Signal Processing, 2016 - Springer
This paper presents a current stimulator circuit that its output can be configured to generate
the three most efficient current waveforms used in neural stimulation; rising exponential …

High output dynamic range exponential function synthesizer

CR Popa - Microelectronics Journal, 2017 - Elsevier
The paper presents two original high-accuracy exponential function synthesizers with wide
output dynamic ranges. The improved accuracies of the proposed computational structures …

A new implementation for the logarithmic/exponential function generator

MT Abuelma'atti, NA Tassaduq - Analog Integrated Circuits and Signal …, 2015 - Springer
This paper presents two new approximations for the logarithmic and exponential functions.
These approximations require only a square rooter function, a scalar function and a …

Subthreshold CMOS array for generating a Gaussian distribution of currents

MS Reid, EA Brown… - IEEE Transactions on …, 2006 - ieeexplore.ieee.org
This brief presents a subthreshold CMOS array whose spatial distribution of output currents
approximates a Gaussian, and the distribution has an independently controllable mean and …

A 0.5–1 GHz single stage linear-in-decibel VGA with 80 dB gain range in 0.18 μm CMOS

M Ayat, B Forouzandeh, S Sheikhaei - Analog Integrated Circuits and …, 2013 - Springer
Communication systems require a wide gain range. For example the code-division multiple
access system (CDMA) requires more than 80 dB of gain range so that, many variable gain …

Squaring Circuits

CR Popa, CR Popa - Synthesis of Computational Structures for Analog …, 2012 - Springer
The squaring circuits are very important blocks in analog signal processing, representing the
core for implementing any continuous function, using the limited Taylor series expansion …