lmf380 National Semiconductor Corporation, lmf380 Datasheet - Page 9

• Manufacturer Part Number: lmf380
• Description: Triple One-third Octave Switched-capacitor Active Filter
• Manufacturer: National Semiconductor Corporation

Typical Applications
(Continued)
(a)
(b)
TL H 11123 – 9
TL H 11123 – 10
(c)
TL H 11123 – 11
(d)
TL H 11123 – 12
FIGURE 4 Examples of detectors for audio signals (a) Half-wave peak detector (b) Half-wave average detector
(c) Full-wave peak detector (d) Full-wave average detector All diodes are 1N914 or 1N4148 Input RC low-pass filters
attenuate clock noise from switched-capacitor filters values shown are for 1 kHz cutoff frequency C
should be at
IN
least 0 27 mF for frequency bands below 50 Hz and 0 1 mF for higher frequencies Power supplies (not shown) should
be bypassed with at least 0 1 mF close to the amplifiers
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