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STA1102R Folha de dados(PDF) 7 Page - STMicroelectronics |
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STA1102R Folha de dados(HTML) 7 Page - STMicroelectronics |
7 / 18 page STA1102R Functional description Doc ID 16470 Rev 5 7/18 3 Functional description 3.1 Equalizer The adjustable input equalizer reduces system jitter and attenuation from long or lossy cables. Shaping is performed by the gain stage of the equalizer to compensate the signal. Note: 9 dB EQ is useful for signal recovery over long PCB track, e.g. 10” FR4. 3.2 Pre-emphasis The STA1102R provides at each output a differential pair of 1-bit programmable pre- emphasis to compensate for losses across long PCB tracks and interconnects after the re- driver output. Below, the truth table of the pre-emphasis control is shown: Table 3. Input equalizer truth table EN E1 E2 Function 0x x Low power mode: input stage disabled for minimum power consumption 100 Normal operation mode: both CH1 and CH2 7dB EQ 101 Normal operation mode: CH1 7dB EQ; CH2 9dB EQ 110 Normal operation mode: CH1 9dB EQ; CH2 7dB EQ 111 Normal operation mode: both CH1 and CH2 9dB EQ Table 4. Pre-emphasis truth table EN D1 D2 Functions 0xx Low power mode: output driver disabled; output driven to HiZ 10 0 Normal operation mode: both CH1 and CH2 0 dB pre-emphasis 10 1 Normal operation mode: CH1 0 dB pre-emphasis; CH2 2.5 dB pre-emphasis 11 0 Normal operation mode: CH1 2.5 dB pre-emphasis; CH2 0 dB pre-emphasis 11 1 Normal operation mode: both CH1 and CH2 2.5 dB pre-emphasis Obsolete Product(s) - Obsolete Product(s) |
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Descrição semelhante - STA1102R |
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