参数资料
型号: MAX2079CXE+T
厂商: Maxim Integrated Products
文件页数: 19/49页
文件大小: 0K
描述: IC OCT ULTRASOUND RCVR 144CTBGA
标准包装: 1,000
系列: *
Low-Power, High-Performance, Fully Integrated
Octal Ultrasound Receiver (Octal LNA, VGA,
AAF, ADC, and CWD Beamformer)
MAX2079
26
Maxim Integrated
Programmable, Digital
Highpass 2-Pole Filter
Digital Highpass Filter Characteristics
This digital HPF is implemented as the cascade of two
identical first-order highpass IIR filter sections. Each
section implements the difference equation:
y[n] R y[n - 1] x[n] - x[n - 1]
= ×+
Where x[n] is the input and y[n] is the output. The
highpass 3dB corner frequency is established by the
filter coefficient (R). Each section can be independently
programmed to one of 10 possible values or placed into
bypass mode. The available filter coefficient values and
corresponding cutoff frequency are given in Table 1.
Table 1. Digital Filter Cutoff-Frequency Setting
FILTeR COeFFICIeNT (R)
3dB CUTOFF FReQUeNCY
(fS/2)
3dB CUTOFF FReQUeNCY
MHz (fS = 50Msps)
ONe-FILTeR SeCTIONS
54/64
0.843750
0.046294
1.157
55/64
0.859375
0.041943
1.049
56/64
0.875000
0.037535
0.938
57/64
0.890625
0.033069
0.827
58/64
0.906250
0.028544
0.714
59/64
0.921875
0.023956
0.599
60/64
0.937500
0.019303
0.483
61/64
0.953125
0.014584
0.365
62/64
0.968750
0.009796
0.245
63/64
0.984375
0.004935
0.123
TWO-FILTeR SeCTIONS
54/64
0.843750
0.069441
1.736
55/64
0.859375
0.062915
1.573
56/64
0.875000
0.056303
1.408
57/64
0.890625
0.049604
1.240
58/64
0.906250
0.042816
1.070
59/64
0.921875
0.035934
0.898
60/64
0.937500
0.028955
0.724
61/64
0.953125
0.021876
0.547
62/64
0.968750
0.014694
0.367
63/64
0.984375
0.007403
0.185
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