The EL6204 is a push-pull oscillator used to reduce laser noise.
It uses the standard interface to existing ROM controllers. The
frequency and amplitude are each set with a separate resistor
connected to ground. The tiny package and harmonic
reduction allow the part to be placed close to a laser with low
RF emissions. An auto turn-off feature allows it to easily be
used on combo CD-RW plus DVD-ROM pickups.
If the APC current is reduced such that the average laser
voltage drops to less than 1.1V, the output and oscillator are
disabled, reducing power consumption to a minimum.
The current drawn by the oscillator consists of a small utility
current, plus the peak output amplitude in the positive cycle. In
the negative cycle the oscillator subtracts peak output
amplitude from the laser APC current.
The EL6204 part is available in the space-saving 6 Ld SOT-23
package and is specified for operation from 0°C to +70°C.

Features
• Low power dissipation
• User-selectable frequency from 60MHz to 600MHz
controlled with a single resistor
• User-specified amplitude from 10mAP-P to 100mAP-P
controlled with a single resistor
• Auto turn-off threshold
• Soft edges for reduced EMI
• Small 6 Ld SOT-23 package

Applications
• DVD players
• DVD-ROM drives
• CD-RW drives
• MO drives
• General purpose laser noise reduction
• Local oscillators