2 results about "Chopper amplifier" patented technology

This invention relates to a chopper amplifier, comprising a clock generator module, an input chopper module, an amplifier module, and an output chopper module. The clock generator module includes a zero-crossover aligned clock circuit, which outputs an intermediate clock based on the differential input signal and detects the zero-crossover point, aligning the edge of the intermediate clock to the zero-crossover point to generate an aligned chopper clock. The output chopper module is connected to a self-filling circuit, which, in conjunction with the chopper clock, samples the differential output voltage during the chopper steady-state phase and, during the chopper transition phase, forms a short circuit between the differential output nodes, causing the current polarity of the amplifier module to internally reverse, while simultaneously performing self-filling. By utilizing zero-crossover aligned chopper technology and / or self-filling technology, intermodulation distortion caused by chopping is suppressed or eliminated mechanistically without increasing power consumption or noise, significantly improving the linearity and usable input frequency range of the chopper amplifier.

A chopper circuit for a multipath chopper amplifier is described. The chopper circuit comprises a first chopper device in a first circuit path, wherein the first chopper device is configured to be controlled by a first clock signal, which has a first frequency; and a second chopper device in a second circuit path, parallel to the first circuit path, wherein the second chopper device is configured to be controlled by a second clock signal, which has a second frequency, wherein the first frequency is greater than the second frequency. Furthermore, a corresponding method of chopping an input signal is described.