PSB2163T-V31TR Infineon Technologies, PSB2163T-V31TR Datasheet - Page 266

• Manufacturer Part Number: PSB2163T-V31TR
• Description: IC AUDIO RINGING CODEC 28-PDSO
• Manufacturer: Infineon Technologies
• Series: ARCOFI®r

Specifications of PSB2163T-V31TR

• Function: CODEC Filter
• Interface: IOM-2, PCI, Serial
• Number Of Circuits: 1
• Voltage - Supply: 5V
• Current - Supply: 900µA
• Power (watts): 1mW
• Operating Temperature: -25°C ~ 80°C
• Mounting Type: Surface Mount
• Package / Case: DSO-28
• Includes: Activation and Deactivation, B-Channel and D-Channel HDLC Controllers, D-Channel Priority Handler, Monitor Channel Handler
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification
• Other names: PSB2163T-V31INTR; PSB2163T-V31TR

The names chosen for the files in this example are UPPER.LIM and LOWER.LIM.
Table 3
Listing of Boundary Curves (in Hz and dB)
Upper Curve
1000
2000
3400
The frequency response of the microphone can be measured. The sampling points are
also input into a text file. For example it is assumed, that the appropriate file is
PRIMO.DAT as shown in table 1. Because frequencies under 300 Hz and above
3400 Hz are blocked by the ARCOFI-SP filters, only the sampling points in the range
300 Hz - 3400 Hz should be entered in the file. In order to obtain a good approximation,
at least 20 points between 300 Hz and 3400 Hz should be selected. However, not more
than 100 points should be entered.
After having entered the measurement points, the program ARCOS-SP PLUS is called.
When in the ASP-Window, a click with the left mouse button upon the FX field opens a
display where the input files, the optimization mode and the optimization speed have to
be selected. For this example the optimization mode "limited by an upper and a lower
curve" must be chosen. The input function is the file called PRIMO.DAT, the upper and
lower curves are given with the files UPPER.DAT and LOWER.DAT. A click upon the "OK"
field starts the calculation.
At the end of the approximation process the frequency response of the microphone
(input function) and that of the FX correction filter (filter function) are added and the sum
is displayed together with the two limiting curves. Notice that the curves are shifted. The
value of the amplitude at the reference frequency (1000 Hz in the example) is 0 dB. The
two limiting curves are shifted such that the mean value of the limiting curves at the
reference frequency is 0 dB.
As already described, the linear deviation of the filter function is a indication of the quality
of the coefficient set. The calculation in this example should be done several times until
a set of coefficients is found, that results in a deviation of less than 2 dB.
Semiconductor Group
0
4
4
266
Lower Curve
300
1000
3000
3400
12
6
6
9
SIPO 2163