Stray-free first-order circuit for correction of sample-and-hold amplitude distortion in switched-capacitor filters

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Stray-free first-order circuit for correction of sample-and-hold amplitude distortion in switched-capacitor filters

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© The Institution of Electrical Engineers
Published

The letter presents a simple new circuit for the correction of amplitude deviations arising from the sample-and-hold effect in switched-capacitor filters. The new circuit is first-order and is connected in cascade at the output of the filter. Unlike a previous circuit, the new circuit is stray-free and has a bi-linera transfer function. Design information is given in the form of a table.

Inspec keywords: cascade networks; electric distortion; switched capacitor filters

Other keywords: sample/hold amplitude distortion correction; stray-free; switched-capacitor filters; first-order circuit; bilinear transfer function; active filters; cascade

Subjects: Active filters and other active networks

References

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      • J. Franca . Nonrecursive polyphase switched-capacitor decimators and interpolators. IEEE Trans. , 877 - 887
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      • R. Datar , A. Sedra . Exact design of stray-insensitive switched capacitor ladder filters. IEEE Trans. , 888 - 898
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      • S.O. Scanlan . Analysis and synthesis of switched-capacitor statevariable filters. IEEE Trans. , 85 - 92
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      • G.F. Franklin , J.D. Powell , M.L. Workman . (1990) , Digital control of dynamic systems.
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      • R. Gregorian , G.C. Temes . Self-equalising sample-and-hold circuits. Electron. Lett. , 367 - 368
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