A high-swing, high-impedance MOS cascode circuit

Sackinger, E.; Guggenbühl, W.

doi:10.1109/4.50316

Cited by 465 publications

(112 citation statements)

References 8 publications

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“…[11,12] . 트랜스컨덕터-커패시터 필터에서 연속적인 주파수 미세 튜닝을 위한 기존 의 트랜스컨덕턴스 조절부는 단일 MOSFET의 선형 전항을 이용한 구조 [13,14] , 두 개의 차동 MOSFET을 이용한 전류 조종 구조 [15] 등이 있다.…”

Section: 간접 주파수 제어의 또 다른 방식인 전압제어필unclassified

Integrated Filter Circuits Design for Mobile Communications

Lee¹

2013

The Journal of Korean Institute of Communications and Informati

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A new frequency tuning scheme and a transconductor with a wide tuning range and low harmonic distortion is presented. This frequency tuning technique is based on the relationship between the time-constant and the elapsed times in charging a capacitor up to a certain level. Its structure is as simple as that of a conventional tuning scheme using a VCF(Voltage-Controlled Filter) and it does not need a pure sine wave but uses a CLK(Clock) pulse as a reference signal, which is easily obtained from on-chip system clocks or external X-tal oscillators.When a certain reference CLK is given, without complex capacitor arrays the pole frequency of the filter can be controlled continuously in the frequency domain. Simulation results are presented to confirm the operation of the proposed approach.

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Section: 간접 주파수 제어의 또 다른 방식인 전압제어필unclassified

Integrated Filter Circuits Design for Mobile Communications

Lee¹

2013

The Journal of Korean Institute of Communications and Informati

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“…The current conveyor of figure 9 and the amplifier described in figure 4 use both a current mirror architecture so called "wide swing mirror" [9][10]. It is shown in figure 12(b), beside the classical cascode.…”

Section: B the Wide Swing Current Mirrormentioning

confidence: 99%

Auto-zero stabilized CMOS amplifiers for very low voltage or current offset

Dzahini

Ghazlane²

2003

2003 IEEE Nuclear Science Symposium. Conference Record (IEEE Cat. No.03CH37515)

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Abstract---In this paper, we present two amplifiers designed in CMOS technology and including an auto-zero architecture for very low offset control. The first design is a high precision operational amplifier focusing on the voltage offset. It is a continuous time auto-zero stabilized architecture, that leads to a typical input offset voltage of 2µV-100nV/°C. The amplifier with its output buffer consumes 5mW at a supply voltage of +/-2.5V. The gain bandwidth product is 2MHz while the slew rate is respectively -6V/µs and +8.8V/µs on 10pF with 10KΩ load. This amplifier is suitable for the control of large dynamic (>10 5 ) calibration signal, and for very low DC signal instrumentation.The second design is a current mode charge pulse amplifier based on a second generation positive current conveyor topology (CCII). The bandwidth, the dynamic range and the output impedance have been optimized using an enhanced cascode current mirror. The preamplifier provides two outputs: one for the signal integration, and another going through a current comparator for a digital counting flow. The double hit resolution is less than 7ns. An auto-zero compensation has been added to this preamplifier to control its output current offset down to 60nA. The total power dissipation (preamplifier + offset cancelation + comparator) is less than 1mW. This second amplifier has been designed for low power space applications, especially EUSO (Extreme Universe Space Observatory), which use multianode PMT in the configuration of a large gate time (2.5µs) open for charge integration.

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“…In a subthreshold mode of operation, the transconductance does not depend on the transistor dimensions (2), thus this figure cannot be improved by transistor sizing. A boosted configuration [3] was chosen for the current-buffer implementation [ Fig. 3(b)].…”

Section: A Current Buffermentioning

confidence: 99%

A low-light-level sensor for medical diagnostic applications

Perelman

Ginosar

2001

IEEE J. Solid-State Circuits

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Abstract-A low-level light sensor and preprocessor for a disposable medical probe is described. A 10-Hz 4-A/cm 2 input optical signal in the visible spectrum is assumed in chemoluminant diagnostic applications. A single-bit first-order sigma-delta modulator has been employed for analog-to-digital conversion, thanks to its robustness, simplicity, inherent linearity, and high signal-to-noise ratio. A current buffer has been used to replicate the weak signal with sufficient bandwidth. Tests have shown the feasibility of this approach, and have also enabled improvements of the design.

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A high-swing, high-impedance MOS cascode circuit

Cited by 465 publications

References 8 publications

Integrated Filter Circuits Design for Mobile Communications

Integrated Filter Circuits Design for Mobile Communications

Auto-zero stabilized CMOS amplifiers for very low voltage or current offset

A low-light-level sensor for medical diagnostic applications

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