A Single-chip Hearing Aid With One Volt Switched Capacitor Filters

Wayne, David A.; Rives, M.; Huynh, Tho Huynh Tho; Preves, David A.; Newton, J.

doi:10.1109/cicc.1992.591152

Cited by 12 publications

(1 citation statement)

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“…This latter restriction ensures that the gain and Q-factor selectivity remain the same over the swept frequency range. This is often a desirable property in a programmable hearing aid used for low frequency gain compensation [12]. If more flexibility is needed in the frequency response of the filter, then the filter gain and selectivity can be varied according to Eq.…”

Section: Fig 6 Low-pass Filter Simulationsmentioning

confidence: 99%

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 Simulationsmentioning

confidence: 99%