LM1894MX/NOPB National Semiconductor, LM1894MX/NOPB Datasheet - Page 9

• Manufacturer Part Number: LM1894MX/NOPB
• Description: IC NOISE REDUCT SYS DYNAM 14SOIC
• Manufacturer: National Semiconductor
• Type: Dynamic Noise Reductionr

Specifications of LM1894MX/NOPB

• Applications: Automotive Systems, Players, TV
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• For Use With: LM1894MTBD - BOARD EVALUATION LM1894
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM1894MX; *LM1894MX/NOPB; LM1894MX

Application Hints
FOR FURTHER READING
Tape Noise Levels
1. “A Wide Range Dynamic Noise Reduction System”, Black-
mer, “dB” Magazine,August-September 1972, Volume 6, #8.
2. “Dolby B-Type Noise Reduction System”, Berkowitz and
Gundry, Sert Journal,May-June 1974, Volume 8.
3. “Cassette vs Elcaset vs Open Reel”, Toole, Audioscene
Canada, April 1978.
4. “CCIR/ARM: A Practical Noise Measurement Method”,
Dolby, Robinson, Gundry, JAES,1978.
FIGURE 6. Technique for Measuring S/N Improvement of the DNR System
(Continued)
FIGURE 5. Bar Graph Display of Peak Detector Voltage
9
Noise Masking
1. “Masking and Discrimination”, Bos and De Boer, JAES,
Volume 39, #4, 1966.
2. “The Masking of Pure Tones and Speech by White Noise”,
Hawkins and Stevens, JAES, Volume 22, #1, 1950.
3. “Sound System Engineering”, Davis Howard W. Sams and
Co.
4. “High Quality Sound Reproduction”, Moir, Chapman Hall,
1960.
5. “Speech and Hearing in Communication”, Fletcher, Van
Nostrand, 1953.
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