Overview 

As the number of wireless devices in the world increases, so does the demand for flexible radio receiver architectures capable of operating over a wide range of frequencies and communication protocols. The resonance-based channel-select filters used in traditional radio architectures have a fixed frequency response, making them poorly suited for such a receiver. The N-path filter is based on 1960s technology that has received renewed interest in recent years for its application as a linear high Q filter at radio frequencies. N-path filters use passive mixers to apply a frequency transformation to a baseband low-pass filter in order to achieve a high-Q band-pass response at high frequencies

Purpose

A high Q-bandpass filter and tunable center frequency applied for receiver or antenna

Knowledge Related 

• Basic understanding of N-Paths filter: center frequency, bandwith, quality factor, ...

• Software: cadence, MATLAB, ...

• Lowpass filter design: OTA, switch capacitor, RC filter,...