Connection Help with UA760 Differential Comparator

Workhorse · 12th February 2006, 07:20 AM

Hi Folks,

Just Drawn this schematic, Does the connections are OK with respect to the polarity and Negative feedback arrangement....
Comparator is UA760 differential comparator.....

regards,
K a n w a r

Workhorse · 12th February 2006, 07:27 AM

Here is the link to the datasheet of UA760

http://www.tranzistoare.ro/datasheets/400/303666_DS.pdf

Workhorse · 12th February 2006, 09:13 AM

classd4sure · 12th February 2006, 08:13 PM

Hi Kanwar,

That's TTL output so you might need a pullup no?

Regards,
Chris

powerbecker · 12th February 2006, 10:38 PM

Hello Kanwar,

for short view it seems OK for me, Chris please have a look to the schematic on page 2 : I think the output don´t need a pullup.
Regards
Heinz!

Workhorse · 13th February 2006, 12:39 AM

Hi,

Its a TTL output, but its also Push-Pull type not an open collector type thats why it doesnot need pull up resistors...

I think the polarity of audio signal at the output would be inverted and the amp behaves as an inverting amp
So the connections regarding polarity are OK isn't it.....

K a n w a r

powerbecker · 13th February 2006, 12:51 AM

...and when not : there are minimal two easy possibilities to change the polarity!

Heinz!

Workhorse · 13th February 2006, 01:01 AM

Hi HeinZ,

Yes two option one is to swap the output of comparator and second one is to swap the inputs....but the connections in my point of view were already OK...

Workhorse · 15th February 2006, 02:16 AM

Hi everyone ,

If we put a signal at input 2 of UA760 than inverted signal is obtained at output 2, but non-inverted signal is obtained from output 1..

If we put a signal at input 1 of UA760 than inverted signal is obtained at output 1, but non-inverted signal is obtained from output 2..

Therefore its clearly evident that to get non inverted output signal one has to feed the signal to its either input, but take the signal from complemented output....

If input 1 is used than say output 2 will serve with same polarity of signal....
If input 2 is used than say output 1 will serve with same polarity of signal...

Correct me If I were wrong....

K a n w a r

powerbecker · 15th February 2006, 03:03 AM

Hello Kanwar,

still with this antique?

Strange: no signs for polarities or a truth table,
only (for luck) the schema!
I would say it´s OK like You write!
Regards
Heinz!

12th February 2006, 07:27 AM	#2
Workhorse diyAudio Member Join Date: Dec 2004	Here is the link to the datasheet of UA760 http://www.tranzistoare.ro/datasheets/400/303666_DS.pdf __________________ It's a fruitless endeavor to try and educate a fool that rejoices in ignorance

12th February 2006, 09:13 AM	#3
Workhorse diyAudio Member Join Date: Dec 2004	__________________ It's a fruitless endeavor to try and educate a fool that rejoices in ignorance

13th February 2006, 12:39 AM	#6
Workhorse diyAudio Member Join Date: Dec 2004	Hi, Its a TTL output, but its also Push-Pull type not an open collector type thats why it doesnot need pull up resistors... I think the polarity of audio signal at the output would be inverted and the amp behaves as an inverting amp So the connections regarding polarity are OK isn't it..... K a n w a r __________________ It's a fruitless endeavor to try and educate a fool that rejoices in ignorance

13th February 2006, 01:01 AM	#8
Workhorse diyAudio Member Join Date: Dec 2004	Hi HeinZ, Yes two option one is to swap the output of comparator and second one is to swap the inputs....but the connections in my point of view were already OK... __________________ It's a fruitless endeavor to try and educate a fool that rejoices in ignorance

15th February 2006, 02:16 AM	#9
Workhorse diyAudio Member Join Date: Dec 2004	Hi everyone , If we put a signal at input 2 of UA760 than inverted signal is obtained at output 2, but non-inverted signal is obtained from output 1.. If we put a signal at input 1 of UA760 than inverted signal is obtained at output 1, but non-inverted signal is obtained from output 2.. Therefore its clearly evident that to get non inverted output signal one has to feed the signal to its either input, but take the signal from complemented output.... If input 1 is used than say output 2 will serve with same polarity of signal.... If input 2 is used than say output 1 will serve with same polarity of signal... Correct me If I were wrong.... K a n w a r __________________ It's a fruitless endeavor to try and educate a fool that rejoices in ignorance


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12th February 2006, 08:13 PM	#4
classd4sure Account Disabled Join Date: Feb 2004	Hi Kanwar, That's TTL output so you might need a pullup no? Regards, Chris

12th February 2006, 10:38 PM	#5
powerbecker diyAudio Member Join Date: Dec 2004 Location: Berlin	Hello Kanwar, for short view it seems OK for me, Chris please have a look to the schematic on page 2 : I think the output don´t need a pullup. Regards Heinz!

13th February 2006, 12:51 AM	#7
powerbecker diyAudio Member Join Date: Dec 2004 Location: Berlin	...and when not : there are minimal two easy possibilities to change the polarity! Heinz!

15th February 2006, 03:03 AM	#10
powerbecker diyAudio Member Join Date: Dec 2004 Location: Berlin	Hello Kanwar, still with this antique? Strange: no signs for polarities or a truth table, only (for luck) the schema! I would say it´s OK like You write! Regards Heinz!

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