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| 型號： | 935264539557 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封裝： | SOT-317, MQFP-100 |
| 文件頁數(shù)： | 9/19頁 |
| 文件大?。?/td> | 162K |
| 代理商： | 935264539557 |
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VES1993
Information as of 2000-08-17
VES1993; Single Chip Satellite Channel Receiver
The VES 1993 is a single-chip channel receiver for satellite television reception which matches both DSS and DVB-S standards. The
device contains a dual 6-bit flash analog to digital converter, variable rate BPSK/QPSK coherent demodulator and Forward Error Correction
functions.The ADCs directly interface with I and Q analog baseband signals. After A to D conversion, the VES 1993 implements a bank of
cascadable filters as well as antialias and half-Nyquist filters. Analog AGC signal is generated by an amplitude estimation function. The
VES 1993 performs clock recovery at twice the Baud rate and achieves coherent demodulation without any feedback to the local oscillator.
Forward Error Correction is built around two error correcting codes : a Reed-Solomon (outer code), and a Viterbi decoder (inner code). The
Reed-Solomon decoder corrects up to 8 erroneous bytes among the N bytes of one data packet. Convolutional deinterleaver is located
between the Viterbi output and the R.S. decoder input. De-interleaver and R.S. decoder are automatically synchronized thanks to the frame
synchronisation algorithm which uses the sync pattern present in each packet. The VES 1993 is controlled via an I2C bus interface. The
circuit operates up to 91MHz and can process variable modulation rates, up to 45Mbaud.
The VES 1993 provides an interrupt line which can be programmed on either events or timing information.
Designed in 0.35 CMOS technology and housed in a 100-MQFP package, the VES 1993 operates over the commercial temperature range.
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DSS and DVB-S compatible single chip demodulator & forward error correction.
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Dual 6-bit ADC on chip.
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PLL for crystal frequency multiplication.
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Variable rate BPSK/QPSK coherent demodulator.
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Modulation rate from 1 to 45MBaud.
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Automatic Gain Control output.
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Digital symbol timing recovery :
Acquisition range up to +- 240ppm
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Digital carrier recovery :
Acquisition range up to +- 12pct of symbol rate
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| 935269304128 | 制造商:ST-Ericsson 功能描述:IC AUDIO CODEC W/TCH SCRN 48LQFP |
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