5results about "Time-varying network" patented technology

The utility model provides a switch filter bank. The switch filter bank comprises a first switch, a first filter bank, a second switch, a third switch, a second filter bank and a fourth switch which are connected in sequence, the first filter bank comprises a first filter, a second filter, a third filter, a fourth filter and a fifth filter which are connected in parallel; the second filter bank comprises a sixth filter, a seventh filter, an eighth filter, a ninth filter and a tenth filter which are connected in parallel. The first switch, the second switch, the third switch and the fourth switch are all single-pole five-throw switches. According to the utility model, accurate frequency point output is obtained by cascading the two groups of filters and switching the switches, the requirements of distribution of the frequency points and segmentation of the filters are met, and only the switches of one switch filter group need to be switched when adjacent frequency points are output in the scheme. Meanwhile, the switching filter bank is designed by utilizing the scheme, and the use passband of the filter bank can be changed by changing the frequency band of one of the filter banks.

According to a band-pass filter, n represents a natural number equal to or more than one, and the band-pass filter includes: an input terminal (1) to receive an input of an RF signal; a multi-phase splitter (3) to split the RF signal input to the input terminal into n RF signals whose phases each differ by 360 degrees / n; n signal paths (17 to 20) to receive from the multi-phase splitter, sample, and hold one of the n RF signals whose phases each differ by the 360 degrees / n, and output the held signal, the n signal paths being connected to the multi-phase splitter, and each signal path including a sample hold element including two switches; a multi-phase synthesizer (4) to synthesize n signals output from the n signal paths, the multi-phase synthesizer (4) being connected to the n signal paths; an output terminal (2) to output the signals to be synthesized by the multi-phase synthesizer; and a clock signal source (21) to output a clock signal (S1) for driving all of switches.

According to a band-pass filter, n represents a natural number equal to or more than one, and the band-pass filter includes: an input terminal to receive an input of an RF signal; a multi-phase splitter to split the RF signal into n RF signals whose phases each differ by 360 degrees / n; n signal paths to receive from the multi-phase splitter, sample, and hold one of the n RF signals, and output the held signal, the n signal paths being connected to the multi-phase splitter, and each signal path including a sample hold element including two switches; a multi-phase synthesizer to synthesize n signals output from the n signal paths, the multi-phase synthesizer being connected to the n signal paths; an output terminal to output the signals to be synthesized by the multi-phase synthesizer; and a clock signal source to output a clock signal for driving all of switches.

A bandpass filter (1) includes: an input terminal (2A) to receive an input of a high frequency signal; an output terminal (2B) to output an output signal; differential switches (4 to 9) provided between the input terminal (2A) and the output terminal (2B), connected in a tournament pattern with a plurality of switches (10 to 21) controlled according to a clock signal, and each including two switches; and capacitances (22 to 25) each including one end connected to a connection point between the switches of the differential switches, and another end grounded.