Abstract: A track-and-hold peak detector circuit, which can operate at low input signal frequencies, includes a capacitor to hold a peak voltage of the input signal and logic circuitry that reduces an effect of leakage current into or out of the capacitor, and therefore, provides protection against self-switching of an output signal of the peak detector circuit.

Abstract: A track-and-hold peak detector circuit, which can operate at low input signal frequencies, includes a capacitor to hold a peak voltage of the input signal and logic circuitry that reduces an effect of leakage current into or out of the capacitor, and therefore, provides protection against self-switching of an output signal of the peak detector circuit.

Abstract: A high pass filter comprising a combination of capacitors and insulated gate field effect transistors (IGFETs) used as effective resistors provides a low break frequency, while providing improved linearity and a stable break frequency over a relatively wide range of input voltages. The high pass filter can be realized with a small physical size. In one particular embodiment, the small physical size allows the capacitors and the IGFET devices to be integrated together onto a common substrate.