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CONTINUOUS TIME FILTER
The continuous-time filter comprises a 7-order, 0.05 degree equiripple low-pass filter with a second-derivative section for pulse slimming. The filter transfer function is characterized by three parameters that controls the boost in the second-derivative section, the phase asymmetry, and the cut-off frequency of the low-pass filter. These parameters are programmable.
The DC gain of the filter is independent of the cutoff frequency and the boost.
FEATURES
- 0.29 mm BiCMOS 3.3 V technology
- minimum cutoff frequency: 6 MHz
- maximum cutoff frequency: 130 MHz
- maximum boost: 13 dB
- boost variation: -1.5 dB…1.5 dB
- gain variation: -3 dB…3 dB
- group delay variation:
- no boost: (-10 %
10%)*tFc
- full boost: (-14 %
14 %)*tFc
- phase asymmetry range: (-30 %
30 %)*tFc
- maximum input signal: 100 mV
- maximum output filter level: 600 mVp-p, diff
- filter d.c. gain; 17 dB…19 dB
SYSTEM OVERVIEW
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