PSB21373HV11XT Infineon Technologies, PSB21373HV11XT Datasheet - Page 108
PSB21373HV11XT
Manufacturer Part Number
PSB21373HV11XT
Description
Manufacturer
Infineon Technologies
Type
PCMr
Datasheet
1.PSB21373HV11XT.pdf
(242 pages)
Specifications of PSB21373HV11XT
Number Of Channels
1
Number Of Adc's
1
Number Of Dac's
1
Number Of Adc Inputs
1
Pin Count
44
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant
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PSB 21373
4.2
Signal Processor (DSP) Description
The signal processor (DSP) has been conceived to perform all ITU-T and ETSI (NET33)
recommended filtering in transmit and receive paths and is therefore fully compatible to
the ITU-T G.712 and ETSI (NET33) specifications. The data processed by the DSP is
provided in the transmit direction by an oversampling A/D-converter situated in the
analog front end (AFE). Once processed, the speech signal is converted into an 8-bit A-
law or -law PCM format or remains as a 16-bit linear word (2s complement) if the
compression stage is bypassed. In the receive direction, the incoming PCM data is
expanded into a linear format (if the linear mode is selected, the expansion logic is
bypassed) and subsequently processed until it is passed to the oversampling D/A-
converter.
Additionally to these standard codec functions an universal tone generation unit and a
high quality speakerphone function is provided. Figure 58 shows the processor signal
flow graph which illustrates the following description of the signal processing in receive
and transmit direction, the tone generation and speakerphone function.
Data Sheet
108
2002-05-13
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