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Wilson current mirror

About: Wilson current mirror is a research topic. Over the lifetime, 109 publications have been published within this topic receiving 1499 citations.


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Patent
03 Sep 1993
TL;DR: In this paper, the authors proposed to convert a differential voltage of an output of a Wilson current mirror into a current by employing the current mirror in order to detect a current of an H bridge circuit for motor drive.
Abstract: PURPOSE:To convert a differential voltage of an output of a Wilson current mirror into a current by employing the current mirror in order to detect a current of an H bridge circuit for motor drive. CONSTITUTION:The differential amplifier circuit consists of a voltage current conversion circuit 1 converting differential input voltages Vin-, Vin+ into a current and a current voltage conversion section 2 using an operational amplifier having a feedback resistor R1 to restore the current after V/I conversion into a voltage. Then the input voltage of Vin is converted into a current n(Vin/ R0) by V/I conversion of the voltage current conversion circuit 1 and the current is supplied to the current voltage conversion section 2, from which a voltage being the sum of a reference voltage VREF and n.Vin(R1/R0) is outputted.

354 citations

Journal ArticleDOI
TL;DR: A novel level shifter circuit that is capable of converting subthreshold to above-threshold signal levels and does not require a static current flow and can therefore offer considerable static power savings is proposed.
Abstract: In this brief, we propose a novel level shifter circuit that is capable of converting subthreshold to above-threshold signal levels. In contrast to other existing implementations, it does not require a static current flow and can therefore offer considerable static power savings. The circuit has been optimized and simulated in a 90-nm process technology. It operates correctly across process corners for supply voltages from 100 mV to 1 V on the low-voltage side. At the target design voltage of 200 mV, the level shifter has a propagation delay of 18.4 ns and a static power dissipation of 6.6 nW. For a 1-MHz input signal, the total energy per transition is 93.9 fJ. Simulation results are compared to an existing subthreshold to above-threshold level shifter implementation from the paper of Chen et al.

163 citations

Journal ArticleDOI
TL;DR: A novel level shifter, of which the operating range is from a deep subthreshold voltage to the standard supply voltage and includes upward and downward level conversion and is designed for practical applications.
Abstract: Wide-range level shifters play critical roles in ultra- low-voltage circuits and systems. Although state-of-the-art level shifters can convert a subthreshold voltage to the standard supply voltage, they may have limited operating ranges, which restrict the flexibility of dynamic voltage scaling. Therefore, this paper presents a novel level shifter, of which the operating range is from a deep subthreshold voltage to the standard supply voltage and includes upward and downward level conversion. The proposed level shifter is a hybrid structure comprising a modified Wilson current mirror and generic CMOS logic gates. The simulation and measurement results were verified using a 65-nm technology. The minimal operating voltage of the proposed level shifter was less than 200 mV based on the measurement results. In addition to the operating range, the delay, power consumption, and duty cycle of the proposed level shifter were designed for practical applications.

105 citations

Journal ArticleDOI
TL;DR: A novel ultra-low voltage level shifter for fast and energy-efficient wide-range voltage conversion from sub-threshold to I/O voltage with good delay scalability with supply voltage scaling and low sensitivity to process and temperature variations is presented.
Abstract: This paper presents a novel ultra-low voltage level shifter for fast and energy-efficient wide-range voltage conversion from sub-threshold to I/O voltage. By addressing the voltage drop and non-optimal feedback control in a state-of-the-art level shifter based on Wilson current mirror, the proposed level shifter with revised Wilson current mirror significantly improves the delay and power consumption while achieving a wide voltage conversion range. It also employs mixed-Vt device and device sizing aware of inverse narrow width effect to further improve the delay and power consumption. Measurement results at 0.18 μm show that compared with the Wilson current mirror based level shifter, the proposed level shifter improves the delay, switching energy and leakage power by up to 3×, 19×, 29× respectively, when converting 0.3 V to a voltage between 0.6 V and 3.3 V. More specifically, it achieves 1.03 (or 1.15) FO4 delay, 39 (or 954) fJ/transition and 160 (or 970) pW leakage power, when converting 0.3 V to 1.8 V (or 3.3 V), which is better than several state-of-the-art level shifters for similar range voltage conversion. The measurement results also show that the proposed level shifter has good delay scalability with supply voltage scaling and low sensitivity to process and temperature variations.

82 citations

Journal ArticleDOI
TL;DR: In this paper, a new current-mode multiple input maximum circuit with 2n+1 transistors for n inputs is proposed and the output impedance of this circuit is the same order as that of a Wilson current source.
Abstract: A new current-mode multiple input maximum circuit designed with 2n+1 transistors for n inputs is proposed. The output impedance of this circuit is the same order as that of a Wilson current source. This circuit has been fabricated using 0.8 mu m CMOS technology. The experimental result has verified the function of the circuit and shown the merit of high speed and high accuracy.

55 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20212
20203
20193
20185
20172
201611