Showing posts with label Equalizer. Show all posts
Showing posts with label Equalizer. Show all posts

10/07/2014

Preamplifier and Equalizer TDA1523

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FEATURES
• Two independent amplifiers with open-loop gain of 90 dB (typical)
• Internal DC feedback via 140 kΩ resistor from output to feedback point
• AC characteristics that can be determined externally by an RC network
• Electronic on/off switching with transient suppression for switch on
• Head input at DC ground that eliminates the input coupling capacitor
• Minimum external component requirement
• Stability down to a gain of 30 dB
• Low input noise
• Low distortion
• DC input current <2 µA.
GENERAL DESCRIPTION
The TDA1523 is a playback amplifier for car radio/cassette players.

Circuit diagram:
Preamplifier and Equalizer TDA1523
Datasheet for TDA1523: Download
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2/01/2014

LA3600 Equalizer 5 band

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Applications:

  • Portable component stereos, tape-recorders, radio-cassette recorders, car stereos.

Features:

  • On-chip one operational amplifier.
  • 5-band graphic equalizer for one channel can be formed easily by externally connecting capacitors and variable resistors which fix fo (resonance frequency).
  • Series connection of two LA3600’s makes multiband (6 to 10 bands) available.
  • Highly stable to capacitive load.

LA3600 Circuit diagram:


LA3600 Circuit diagram
 LA3600 pcb:
LA3600 pcb

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