Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

LM1894M Datenblatt(PDF) 6 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Teilenummer LM1894M
Bauteilbeschribung  Dynamic Noise Reduction System DNR
Download  10 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM1894M Datenblatt(HTML) 6 Page - National Semiconductor (TI)

Back Button LM1894M Datasheet HTML 2Page - National Semiconductor (TI) LM1894M Datasheet HTML 3Page - National Semiconductor (TI) LM1894M Datasheet HTML 4Page - National Semiconductor (TI) LM1894M Datasheet HTML 5Page - National Semiconductor (TI) LM1894M Datasheet HTML 6Page - National Semiconductor (TI) LM1894M Datasheet HTML 7Page - National Semiconductor (TI) LM1894M Datasheet HTML 8Page - National Semiconductor (TI) LM1894M Datasheet HTML 9Page - National Semiconductor (TI) LM1894M Datasheet HTML 10Page - National Semiconductor (TI)  
Zoom Inzoom in Zoom Outzoom out
 6 / 10 page
background image
Circuit Operation (Continued)
be. As long as the total energy of the noise is equal to or
greater than the energy of the tone, the tone will be inau-
dible. This principle may be turned around; when music is
present, it is capable of masking noise in the same band-
width.
2. The ear cannot detect distortion for less than 1 ms. On a
transient basis, if distortion occurs in less than 1 ms, the ear
acts as an integrator and is unable to detect it. Because of
this, signals of sufficient energy to mask noise open band-
width to 90% of the maximum value in less than 1 ms. Re-
ducing the bandwidth to within 10% of its minimum value is
done in about 60 ms: long enough to allow the ambience of
the music to pass through, but not so long as to allow the
noise floor to become audible.
3. Reducing the audio bandwidth reduces the audibility of
noise. Audibility of noise is dependent on noise spectrum, or
how the noise energy is distributed with frequency. Depend-
ing on the tape and the recorder equalization, tape noise
spectrum may be slightly rolled off with frequency on a per
octave basis. The ear sensitivity on the other hand greatly in-
creases between 2 kHz and 10 kHz. Noise in this region is
extremely audible. The DNR system low pass filters this
noise. Low frequency music will not appreciably open the
DNR bandwidth, thus 2 kHz to 20 kHz noise is not heard.
Block Diagram
DS007918-7
FIGURE 2.
DS007918-8
FIGURE 3. Output vs Frequency
DS007918-9
FIGURE 4. −3 dB Bandwidth vs
Frequency and Control Signal
www.national.com
6


Ähnliche Teilenummer - LM1894M

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Texas Instruments
LM1894MX/NOPB TI1-LM1894MX/NOPB Datasheet
988Kb / 19P
[Old version datasheet]   Dynamic Noise Reduction System DNR
More results

Ähnliche Beschreibung - LM1894M

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Texas Instruments
LM1894 TI1-LM1894 Datasheet
988Kb / 19P
[Old version datasheet]   Dynamic Noise Reduction System DNR
logo
National Semiconductor ...
LM832 NSC-LM832 Datasheet
197Kb / 10P
   Dynamic Noise Reduction System DNR
August 1989
logo
Renesas Technology Corp
HA12181FP RENESAS-HA12181FP Datasheet
302Kb / 20P
   AM Radio Noise Reduction System
logo
Hitachi Semiconductor
HA12181FP HITACHI-HA12181FP Datasheet
147Kb / 21P
   AM Radio Noise Reduction System
logo
Sony Corporation
CXA1100P SONY-CXA1100P Datasheet
473Kb / 15P
   DOLBY B TYPE NOISE REDUCTION SYSTEM
CXA1550P SONY-CXA1550P Datasheet
232Kb / 16P
   Dolby B type Noise Reduction System
logo
Hitachi Semiconductor
HA12134A HITACHI-HA12134A Datasheet
130Kb / 27P
   Dolby B-Type Noise Reduction System
12136AF HITACHI-12136AF Datasheet
101Kb / 27P
   Dolby B-Type Noise Reduction System
logo
NTE Electronics
NTE1801 NTE-NTE1801 Datasheet
22Kb / 3P
   Integrated Circuit TV dbx Noise Reduction System
logo
Sony Corporation
CX20188 SONY-CX20188 Datasheet
1Mb / 22P
   DOLBY B-C TYPE NOISE REDUCTION SYSTEM
More results


Html Pages

1 2 3 4 5 6 7 8 9 10


Datenblatt Download

Go To PDF Page


Link URL




Privatsphäre und Datenschutz
ALLDATASHEETDE.COM
War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Linktausch   |   Hersteller
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com