Band-pass filter using LC resonators

摘要

A band-pass filter includes an input node coupled to receive an oscillating input signal, an output node, and a first LC resonator coupled to a first node coupled between the input node and the output node and to a first power supply node coupled to provide a first voltage. The first LC resonator includes a first capacitor, and a first inductor coupled in series with the first capacitor. The output node is coupled to output a filtered response signal that includes at least one zero based on the oscillating input signal and the first LC resonator.

主权项

1. A band-pass filter, comprising:
an input node coupled to receive an oscillating input signal; an output node; a first LC resonator coupled to a first node coupled between the input node and the output node and to a first power supply node coupled to provide a first voltage, the first LC resonator including:
a first capacitor, anda first inductor coupled in series with the first capacitor, a second LC resonator coupled in parallel with the first LC resonator and coupled to a second node coupled between the input node and the output node, the second LC resonator including:
a second capacitor, anda second inductor disposed in series with the second capacitor; wherein the output node is coupled to output a filtered response signal that includes at least one zero based on the oscillating input signal and the first LC resonator, and wherein the first and second inductors are disposed at a distance from one another on a semiconductor substrate such that the first and second inductors are inductively coupled together.