Hi all,
As part of my Elec. Eng course I have to design a circuit that will take an analogue tv signal (PAL) and display it on an oscilloscope. This isn't too hard considering we have some help, and we are allowed a LM1881 sync separator circuit that does all the nasty stuff for us. I already have a working design, although it's rather decadent in its use of components.
However, while the whole thing can be designed using op-amps provided, I would like to try and make mine a little more unique, if possible. We are given a components list to use which is mainly op-amps, BJTs, voltage regs, diodes and zerner diodes (and resistors and cap and all that). I know for a lot of the amplification parts it is possible though hard to swap out an op-amp for a BJT amplifier design of some sort, but I was also wondering if it was possible to replace the sync separator (or part of it) with something of my own (or someone else's) design.
I have seen a few projects doing this sort of thing on the Internet (with triodes, don't know what those are), but nothing so far that addresses what I am looking for. The reason I want to do this (apart from that it increases your marks) is that there is a class prize that I would like to win to make my parents proud.
Anyway, if anyone has any ideas or can point me in the direction of ideas that would be greatly appreciated. I know you can set up BJTs to act as logic gates and such, so I feel it is at least possible, even if it is implausible. As part of the lab you can submit an application for new components for use in your design so it's a possibility that I can use others too.
Jo
As part of my Elec. Eng course I have to design a circuit that will take an analogue tv signal (PAL) and display it on an oscilloscope. This isn't too hard considering we have some help, and we are allowed a LM1881 sync separator circuit that does all the nasty stuff for us. I already have a working design, although it's rather decadent in its use of components.
However, while the whole thing can be designed using op-amps provided, I would like to try and make mine a little more unique, if possible. We are given a components list to use which is mainly op-amps, BJTs, voltage regs, diodes and zerner diodes (and resistors and cap and all that). I know for a lot of the amplification parts it is possible though hard to swap out an op-amp for a BJT amplifier design of some sort, but I was also wondering if it was possible to replace the sync separator (or part of it) with something of my own (or someone else's) design.
I have seen a few projects doing this sort of thing on the Internet (with triodes, don't know what those are), but nothing so far that addresses what I am looking for. The reason I want to do this (apart from that it increases your marks) is that there is a class prize that I would like to win to make my parents proud.
Anyway, if anyone has any ideas or can point me in the direction of ideas that would be greatly appreciated. I know you can set up BJTs to act as logic gates and such, so I feel it is at least possible, even if it is implausible. As part of the lab you can submit an application for new components for use in your design so it's a possibility that I can use others too.
Jo