Charge pump for optimal dynamic range filters

Monna, G.L.E.; Sandee, J.C.; Verhoeven, C.J.M.; Groenewold, E.; Roermund, Arthur van

doi:10.1109/iscas.1994.409486

Cited by 17 publications

(6 citation statements)

References 2 publications

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“…The circuit exhibited hardly any undershoot and reached steady state quickly due to the reduced switch resistance afforded by the dedicated charge pump driving the output switches. Load currents during start-up and tuning were also observed as expected [13]. …”

Section: Fig 6 Low-pass Filter Simulationssupporting

confidence: 72%

A low-voltage CMOS filter for hearing aids using dynamic gate biasing

Pylarinos

Wong

Phang

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555)

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-In this paper we discuss the design of a low-voltage (1.5V), continuous-time, biquadratic CMOS filter based on Dynamic Gate Biasing (DGB). We begin by discussing the filter's structure and its tuning mechanism. The filter uses transconductance-C cells and implements low-pass, bandpass and highpass transfer functions. The transconductances are tuned using the gate voltages of MOSFETs operating in the triode region. We review the principle of DGB, and discuss the design of the charge pump based on the filter's performance and tunability requirements. Circuit details of the filter elements and the charge pump are presented along with SPICE simulation results of the overall filter.

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Section: Fig 6 Low-pass Filter Simulationssupporting

confidence: 72%

A low-voltage CMOS filter for hearing aids using dynamic gate biasing

Pylarinos

Wong

Phang

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555)

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“…Unlike the transconductors in a G m -C filter, this element does not need to be highly linear. If the technology allows it, on-chip charge pumps can be used to increase the gate voltage V C of the MOSFETs, thus increasing the allowed signal swing [7]. This is easy to accomplish, since the gates do not draw any DC currents.…”

Section: Mosfet-c Filtersmentioning

confidence: 99%

Continuous-time filters in telecommunications chips

Tsividis

2001

IEEE Commun. Mag.

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“…Charge pump is a DC-DC converter that control the charging voltages of the capacitor for creating either a higher or lower voltage power source by taking advantage of capacitors as energy storage elements and switching devices. Over the past few years wearable devices become more popular as many processes worked under low voltages including power IC as a regulator [1,2], TFT-LCD driver circuits [3,4], low power LED [5] and solar powered devices [6]. For this reason, the issues always focusing on designing circuits with higher pumping efficiency, higher power efficiency, higher output power, and lower ripple voltage.…”

Section: Introductionmentioning

confidence: 99%

High Pumping Gain Dickson Charge Pump Using Improved Bootstrapped Technique

Chen¹

2015

AMM

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This paper proposed an improved bootstrapped type high-efficient charge pump circuit based on the Dickson charge pump in order to get a higher pumping efficiency. It is not only avoid the threshold voltage drop in conventional Dickson charge pump circuits but enable them to generate a higher output voltage. Simulation by HSPICE shows that for conventional Dickson charge pump, it convert the input low DC-voltage (Vin=1.5V) up to 3.8 times of it (VOUT=5.77V), the pump efficiency was 76.93%. Our work, however, can convert the low input DC-voltage (Vin=1.5V) up near to 4.76 times of it (VOUT=7.14V), the pump efficiency can reaches as high as 95.2%.

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Charge pump for optimal dynamic range filters

Cited by 17 publications

References 2 publications

A low-voltage CMOS filter for hearing aids using dynamic gate biasing

A low-voltage CMOS filter for hearing aids using dynamic gate biasing

Continuous-time filters in telecommunications chips

High Pumping Gain Dickson Charge Pump Using Improved Bootstrapped Technique

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