new idea for amp

unclejed613 · 25th May 2008, 05:33 PM

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.
http://www.cirrus.com/en/pubs/proDatasheet/PA86U_A1.pdf

any thoughts???

Apex/Cirrus makes a large line of power/high voltage op amps and PWM amps.

djk · 26th May 2008, 12:55 AM

In the past Apex products were quite expensive.

How much is this thing?

(I sent them a request for quote)

unclejed613 · 26th May 2008, 05:55 AM

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...).

Craig405 · 26th May 2008, 11:02 AM

Hi,
I think Marantz do somthing similar with their amps, 'HDAM modules'.
If you didnt already know then it might be of interest

http://images.google.co.uk/imgres?im...%3Den%26sa%3DN

25th May 2008, 05:33 PM	#1
unclejed613 diyAudio Member Join Date: Dec 2006	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. http://www.cirrus.com/en/pubs/proDatasheet/PA86U_A1.pdf any thoughts??? Apex/Cirrus makes a large line of power/high voltage op amps and PWM amps.

26th May 2008, 12:55 AM	#2
djk diyAudio Member Join Date: Feb 2001 Location: USA	In the past Apex products were quite expensive. How much is this thing? (I sent them a request for quote) __________________ Candidates for the Darwin Award should not read this author.

26th May 2008, 11:02 AM	#4
Craig405 diyAudio Member Join Date: Jul 2005 Location: Sussex	Hi, I think Marantz do somthing similar with their amps, 'HDAM modules'. If you didnt already know then it might be of interest http://images.google.co.uk/imgres?im...%3Den%26sa%3DN __________________ Cheers, Craig

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26th May 2008, 05:55 AM	#3
unclejed613 diyAudio Member Join Date: Dec 2006	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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