Complete integrated cardiac sensing channel for pacemakers

A novel complete integrated integrated circuit for cardiac sensing is presented. The design eliminates the use of external components, while also keeping up with the safety requirements and low power consumption of implantable medical devices. The work was developed using a high-voltage technology (HV, XC06 technology was selected [1]). The first stage consists of a completely integrated high pass preamplifier, with 25db gain, 4.5μ V_rms input referred noise (70-200Hz), and 600nW power consumption. The second stage is a 55-180Hz GmC filter that incorporates the ability to filter input signals with a high common mode input up to 15V. Moreover, a novel full wave precision rectifier and a low power comparator are presented to complete the cardiac sensing channel.