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Old 25th May 2008, 04:33 PM   #1
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Default new idea for amp

i saw this device advertized in Electronic Design. it's purpose is a piezo element driver, but i think it might have potential as an input/VAS.

any thoughts???

Apex/Cirrus makes a large line of power/high voltage op amps and PWM amps.
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Old 25th May 2008, 11:55 PM   #2
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In the past Apex products were quite expensive.

How much is this thing?

(I sent them a request for quote)
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Old 26th May 2008, 04:55 AM   #3
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haven't found out yet. they've been bought by Cirrus Semi, so it's possible their prices may come down a bit...... just part of the mental gymnastics i'm going through with a design.... something looks like a candidate for prototyping, so i investigate it and either it works or it doesn't. it would be nice to find a "universal drop-in" front end for an amp design. if it works it would cure a lot of headaches, but on the other hand, it could cause as many headaches as it cures..... part of my idea is a "universal amplifier" that has a "universal" front end, allowing the basic amp design to be scalable for any output power between 50 and 500 watts, the only real differences being the power supply and output stage. a useable (i.e. stable) front end that can operate at any rail voltage from +/- 50 to +/- 100 V would be a step in the right direction. i have already designed a front end that is basically a high voltage op amp, but needs to be "tweaked" to operate properly at various rail voltages( differences in resistor values, etc...).
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Old 26th May 2008, 10:02 AM   #4
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I think Marantz do somthing similar with their amps, 'HDAM modules'.
If you didnt already know then it might be of interest
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