The 741 is an op amp and can be substituted by other op amps without much trouble. For example, this link shows a typical circuit, and to make it complete, you have to look up the Data Sheet for the op amp you want to use and find the pin numbers for the 5 connections to the op amp.
The lousy old 741 opamp is 40 years old this year. It was not designed for audio because it is too noisy and its full output frequency response goes up to only 9kHz.
A TL07x opamp is low noise, inexpensive and has a full output frequency response to 100kHz.
True. But one problem is that if I choose something like that, it may not be available in the market. Buying less than 10 Nos otherwise is too expensive. So I thought you may be suggesting something which is popular and may be available in market (I am looking for DIP Package).
can you just tell me which IC you used?
I made my video amps about 16 years ago. The ICs were made by Motorola. They aren't made anymore. The ICs were inexpensive.
I don't know what is available in your country. Ask somebody in your country.
I made my video amps about 16 years ago. The ICs were made by Motorola. They aren't made anymore. The ICs were inexpensive.
I don't know what is available in your country. Ask somebody in your country.
Video ICs are usually triple (R,G and B) and can drive 150 ohms (75 ohms sending then 75 ohms receiving.
Opamps are usually dual or quad and drive 2k ohms.
Video ICs usually have the gain setting resistors built-in.
Yes. One is RS components India. But problem is that price is 5 to 15 times the open market price for small quantities less than 10 (including their postage charge). Is the case with Digikey different?
Video ICs are usually triple (R,G and B) and can drive 150 ohms (75 ohms sending then 75 ohms receiving.
Opamps are usually dual or quad and drive 2k ohms.
Video ICs usually have the gain setting resistors built-in.
Here I don't need RGB output. Only buffering of composite video required. I think, I can use OPAMPs with higher current drive capacity to drive many 75Ω loads. Many are available, but the availability in the electronics market here to be checked.
I went through it. Seems Digikey is supplying less nos (<10) only for certain items. Price seems to be less than RS but much higher than manufacturer price. In the case of RS delivery is from India and hence courier charges are less. So it seems RS components India is better than Digikey.