SA571F Philips Semiconductors, SA571F Datasheet
SA571F
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SA571F Summary of contents
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SA571 Compandor Product specification IC17 Data Handbook INTEGRATED CIRCUITS 1997 Aug 14 ...
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... Philips Semiconductors Compandor DESCRIPTION The SA571 is a versatile low cost dual gain control circuit in which either channel may be used as a dynamic range compressor or expandor. Each channel has a full-wave rectifier to detect the average value of the signal, a linerarized temperature-compensated variable gain cell, and an operational amplifier. ...
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... Philips Semiconductors Compandor ABSOLUTE MAXIMUM RATINGS SYMBOL Maximum operating voltage V CC 571 Operating ambient temperature range Power dissipation D AC ELECTRICAL CHARACTERISTICS V = +6V unless otherwise stated SYMBOL PARAMETER V Supply voltage CC I Supply current CC I Output current capability OUT SR Output slew rate 2 Gain cell distortion ...
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... Philips Semiconductors Compandor CIRCUIT DESCRIPTION The SA571 compandor building blocks, as shown in the block diagram, are a full-wave rectifier, a variable gain cell, an operational amplifier and a bias system. The arrangement of these blocks in the IC result in a circuit which can perform well with few external components, yet can be adapted to many diverse applications. ...
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... Philips Semiconductors Compandor This paper describes an inexpensive integrated circuit, the SA571 Compandor, which offers a pair of high performance gain control circuits featuring low distortion (<0.1%), high signal-to-noise ratio (90dB), and wide dynamic range (110dB). CIRCUIT BACKGROUND The SA571 Compandor was originally designed to satisfy the requirements of the telephone system ...
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... Philips Semiconductors Compandor RECT OUT REF 4 NOTES GAIN INavg I = 140 A B External components Figure 8. Basic Compressor 10k C R Figure 9. Rectifier Concept CIRCUIT DETAILS—RECTIFIER Figure 9 shows the concept behind the full-wave averaging rectifier. The input current to the summing node of the op amp, V supplied by the output of the op amp ...
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... Philips Semiconductors Compandor INPUT = 0dBm –20dBm 0 –40dBm 3 10k 1MEG FREQUENCY (Hz) Figure 12. Rectifier Frequency Response vs Input Level VARIABLE GAIN CELL Figure diagram of the variable gain cell. This is a linearized two-quadrant transconductance multiplier provide a predistorted drive signal for the gain control pair The gain is controlled by I ...
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... Philips Semiconductors Compandor +20 0 MAXIMUM –20 SIGNAL LEVEL 110dB –40 –60 –80 –100 –40 –20 0 VCA GAIN (0dB) Figure 16. Dynamic Range Control signal feedthrough is generated in the gain cell by imperfect device matching and mismatches in the current sources, I When no input signal is present, changing I ...
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... Philips Semiconductors Compandor SO16: plastic small outline package; 16 leads; body width 7.5 mm 1997 Aug 14 9 Product specification SA571 SOT162-1 ...
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... Philips Semiconductors Compandor DIP16: plastic dual in-line package; 16 leads (300 mil) 1997 Aug 14 10 Product specification SA571 SOT38-4 ...
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... Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. ...