SC and SI filters in baseband applications: a comparison

Helfenstein, M.; Muralt, Arnold; Fischer, G.; Zbinden, Paul; Pfaff, D.; Frey, Felix; Moschytzl, G.S.

doi:10.1109/iscas.1997.608712

Cited by 2 publications

(2 citation statements)

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“…The bilinearly transformed filter suffered from a coefficient spread of 30.8, whereas the f d h d topology has a spread of only 11.2. Furthermore, the pole sensitivity with respect to coefficient variations is reduced by 50% in the latter case (for analytical results, see [7]). …”

Section: -647mentioning

confidence: 99%

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Switched-current biquad using differential, double-sampling, forward/backward difference integrators

Helfenstein¹,

Curty²,

Moschytz³

2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No

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A new switched-current integrator which accomplishes forward and backward difference integration and achieves double-sampling capabilities is described. The signal-flow graphs (SFGs) of several double-sampling integrators are derived and mapped into transistor circuits. Furthermore, as an example, a biquad based on an exact design and operating in differential and double-sampling mode is described and simulated. It is shown that the pole sensitivity of this biquad is reduced by a factor of 2 and the coefficient spread by a factor of 3 when compared with a bilinearly transformed reference filter.

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Section: -647mentioning

confidence: 99%

“…In [7], we implemented and measured a second-order SI bandpass filter with a center frequency of 500kHz and, a pole-Q of 10. The clock frequency was chosen to be 2.5MHz and the desired SNR was above 60dB for a power supply of 3V.…”

Section: -647mentioning

confidence: 99%