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An ultra low-power dynamic translinear cardiac sense amplifier for pacemakers
Haddad, S.A.P.; Gieltjes, S.; Houben, R.; Serdijn, W.A.;
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Volume 5,
25-28 May 2003
Page(s):V-37
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V-40 vol.5
Abstract:
In this paper, a cardiac sense amplifier, i.e. the front end of a pacemaker, based on the dynamic translinear (DTL) circuit technique is presented. The system consists of a voltage-to-current converter, a bandpass filter, absolute value and RMS-DC converter circuits and an event detection circuit. From simulations, it is demonstrated that the DTL technique is a good alternative to conventional sense amplifiers for intra cardiac applications since they handle the required dynamic range and perform non-linear operations at low supply voltages. The circuit operates from a 2-V supply voltage and dissipates 240 nW.
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