Abstract
Experimental results of a switched capacitor (SC) N-path filter integrated in a CMOS Si-gate technology are reported, with N=6. The circuit is based on the theory of wave-flow networks and uses only fully stray-eliminating (usually referred to as stray-insensitive) SC amplifier and integrator circuits. The two main drawbacks of N-path filters, i.e. unwanted mirror frequencies due to path mismatch and clock feedthrough located in the passbands, as solved by multiplexing large filter parts and by using a third-order high-pass reference filter, respectively. The integrated six-path filter features low power consumption due to the use of dynamic amplifiers.
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