This file type includes high-resolution graphics and schematics when applicable. Measuring the signals from extremely high-impedance sensors is a difficult task. Such sensors can have output ...

Given the importance of hemodynamic considerations in heart failure treatment, impedance cardiography (ICG) is a technology that permits economical, noninvasive monitoring of hemodynamic parameters in ...

While switching regulators are often preferred over linear regulators because they are more efficient, the switching topology leans heavily on an input filter. This circuit element, combined with the ...

The circuit in Figure 1d describes a bipolar current source with a simpler feedback configuration than that of the usual Howland-current pump, which requires positive feedback and presents variable ...

In general terms, power amplifiers (PAs) used in communications systems must be large enough to amplify envelope peaks. This leads to amplifiers designed to offer the best efficiency at peak power ...