5results about "One-port active networks" patented technology

This application provides a signal processing circuit and an electronic device. The signal processing circuit includes: a charge amplifier circuit for receiving a differential charge signal output from a sensor; amplifying and converting the differential charge signal to output a first voltage signal; a non-inverting amplifier circuit connected to the charge amplifier circuit for receiving the first voltage signal; amplifying the first voltage signal to output a second voltage signal; a voltage-controlled filter circuit connected to the non-inverting amplifier circuit for receiving the second voltage signal; amplifying and filtering the second voltage signal to output a third voltage signal; and a hysteresis comparator circuit connected to the voltage-controlled filter circuit for receiving the third voltage signal and comparing it to obtain a stable square wave signal. The solution provided in this application can effectively suppress common-mode noise signals, has a fast response speed, is less affected by circuit impedance, and produces a better square wave signal output.

Embodiments of the present disclosure provide a filter, an integrated passive device, an electronic device, and a display apparatus. The filter is applied in the field of radio frequency and includes: a first port, a second port, a first band-stop filter circuit, a low-pass filter circuit, a band-pass filter circuit, and a high-pass filter circuit. The first band-stop filter circuit is coupled to the first port, and is configured to perform out-of-band suppression on a signal input from the first port and input a signal subjected to the out-of-band suppression to the low-pass filter circuit. The low-pass filter circuit is configured to input a first signal, a frequency of which is between a first frequency and a second frequency, of the signal input by the first band-stop filter circuit to the band-pass filter circuit.

Provided is a digital variable reactance element that has a wide variable width. A digital variable reactance element 1 comprises a plurality of digital capacitors 2 and a plurality of digital inductors 4. The plurality of digital capacitors 2 and the plurality of digital inductors 4 are connected in series or in parallel. Each of the plurality of digital capacitors 2 has a capacitor C1 and a first digital switch Q that are connected in series or in parallel, and the first digital switch Q can be switched between two states, which are an on-state and an off-state. Each of the plurality of digital inductors 4 has an inductor L1 and a second digital switch Q that are connected in series or in parallel, and the second digital switch Q can be switched between two states, which are an on-state and an off-state.