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An integrated six-path wave-SC filter

Parallelausgabe: Publications 1985. IMS-Duisburg.
: Brockherde, W.; Fettweis, A.; Hosticka, B.J.; Kleine, U.; Pandel, J.; Zimmer, G.

IEEE journal of solid-state circuits 20 (1985), Nr.2, S.63 ff : Abb.,Tab.,Lit.
ISSN: 0018-9200
Fraunhofer IMS ()

Experimental results of a switched capacitor (SC) N-path filter integrated in a CMOS 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 drawbacks of N-path filters, i.e., unwanted mirror frequencies due to path mismatch and clock feedthrough located in the passbands, are 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. (IMS)