double inverting using 741? - Electronic Circuits Projects Diagrams Free

imgemini · 2nd September 2004, 04:41 PM

hi
is double inverting using 741 is possible :shock:

andy257 · 2nd September 2004, 05:48 PM

By double inverting do you mean double invert the polarity?

If you double invert any signal you will get back what you started with.

e.g invert +5V to get -5V

invert -5V to get +5V

sorry if i have missunderstood your question but it seemed a strange one to ask thats all

andy

samcheetah · 2nd September 2004, 05:53 PM

or is it like to produce a delay line or make a buffer type of thing. like in digital electronics u can put two logic inverters to produce a delay?

John Sorensen · 2nd September 2004, 07:13 PM

The LM741 is a single OP Amp, so I don't know what he's getting at?

With a single inverter you can only invert once. If you wanted to, you could configure it as a buffer and then say the signal is inverted 2*n times.

j.

samcheetah · 2nd September 2004, 07:20 PM

Quote:

With a single inverter you can only invert once. If you wanted to, you could configure it as a buffer and then say the signal is inverted 2*n times.

yes, if imgemini wants that then the buffer configuration is quite basic and can be easily found in books. and if u dont find it then u can find it on the internet.

imgemini · 3rd September 2004, 12:37 AM

friends
i want to feed 10voltage and want to get 20voltage ..... :!:

samcheetah · 3rd September 2004, 05:16 AM

what does that suppose to mean??

are u asking for a 10V to 20V DC-DC step-up converter??

try to explain things a little bit :!:

imgemini · 3rd September 2004, 07:41 AM

yes u r right

i need to convert 10voltage into 20voltage ....... :roll: is this -Non-inverting Operational Amplifiers worki for me and who

circuit will help i guess

Styx · 3rd September 2004, 10:33 AM

are you after 10V POWER to 20V POWER?? If that is the case you need a DC

C converter.

If you are after 10V SIGNAL to 20V SIGNAL use an OPAMP but arrange it as a non-inverting amplifier instead of an inverting amplifier

The gain of an inverting amp is
-Rf/Ri

The gain for a non-inverting is
1+ Rf/Ri

So by using the feedback and input res as both 10k you will get a gain of two.

Search google for "non-inverting amplifier circuits"

checkmate · 4th September 2004, 04:07 AM

I highly doubt the humble 741 can achieve the output voltage swings you require, not to mention that you would need a reasonably high voltage dual supply.
If you have a lower power supply, use a DC-DC convertor. Else use a voltage regulator, or a series of zeners for low-current applications.

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2nd September 2004, 04:41 PM	(permalink)
imgemini	double inverting using 741? hi is double inverting using 741 is possible :shock: __________________ plz help friend,s

2nd September 2004, 05:48 PM	(permalink)
andy257	By double inverting do you mean double invert the polarity? If you double invert any signal you will get back what you started with. e.g invert +5V to get -5V invert -5V to get +5V sorry if i have missunderstood your question but it seemed a strange one to ask thats all andy

2nd September 2004, 05:53 PM	(permalink)
samcheetah	or is it like to produce a delay line or make a buffer type of thing. like in digital electronics u can put two logic inverters to produce a delay?

2nd September 2004, 07:13 PM	(permalink)
John Sorensen	The LM741 is a single OP Amp, so I don't know what he's getting at? With a single inverter you can only invert once. If you wanted to, you could configure it as a buffer and then say the signal is inverted 2*n times. j.

3rd September 2004, 12:37 AM	(permalink)
imgemini	friends i want to feed 10voltage and want to get 20voltage ..... :!: __________________ plz help friend,s

3rd September 2004, 05:16 AM	(permalink)
samcheetah	what does that suppose to mean?? are u asking for a 10V to 20V DC-DC step-up converter?? try to explain things a little bit :!:

3rd September 2004, 07:41 AM	(permalink)
imgemini	yes u r right i need to convert 10voltage into 20voltage ....... :roll: is this -Non-inverting Operational Amplifiers worki for me and who circuit will help i guess __________________ plz help friend,s

3rd September 2004, 10:33 AM	(permalink)
Styx	are you after 10V POWER to 20V POWER?? If that is the case you need a DCC converter. If you are after 10V SIGNAL to 20V SIGNAL use an OPAMP but arrange it as a non-inverting amplifier instead of an inverting amplifier The gain of an inverting amp is -Rf/Ri The gain for a non-inverting is 1+ Rf/Ri So by using the feedback and input res as both 10k you will get a gain of two. Search google for "non-inverting amplifier circuits"

4th September 2004, 04:07 AM	(permalink)
checkmate	I highly doubt the humble 741 can achieve the output voltage swings you require, not to mention that you would need a reasonably high voltage dual supply. If you have a lower power supply, use a DC-DC convertor. Else use a voltage regulator, or a series of zeners for low-current applications.