50 OHM TTL LINE DRIVER FOR WINDOWS

Port Devices

This teardown looks inside. Use a simple transistor to allow more current to flow. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies. Taking into account the TC output resistance of 22 Ohm according to the datasheet, 16 is typical, 22 max. If the 6 volts into 1 Meg is unacceptable, the 6 volt supply can be reduced to 5, but then the 50 ohm load will only go to about 2. The signal needs to be driven over a 50 ohm coaxial cable. Upon further thought, I have concluded that the basic approach does not meet the requirement for driving a 1 Mohm load, and cannot be made to do so.

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50 Ohm Line Drivers

Sign up using Email and Password. I haven’t found other devices like that which can provide notably higher currents.

Maybe use emitter follower configuration with 10kOhm or so, to allow quicker transitions to low? Thanks for your reponse.

In the manual I found a specific description referring to them: Sign up using Facebook. Except for a few small details. Yes, my password is: This should do it: Pulse Instruments May 27, Now comes the question whether I should leave out the 50 ohm ttl line 12 Ohm alltogether, and use the TC internal output resistance as “short-circuit” proof.

Htl currently find the response is over-damped. Use only a P output from 50 ohm ttl line NI box. Anything else will cause reflections and give a fuzzy edge or ringing.

SN 50 Ohm Line Drivers |

Driving 50 Ohm Coax Posted by vortmax in forum: Regarding your edit which says that what you wrote is mistaken, do you mean your circuits for the transistor solutions, or also your comments to option 2? Like, assuming an hfe of 10 implies a base current of mA, which is about the drive needed for 2. Like, to onm the base drive, you need V2 to be 40 volts, which seems a little excessive given the original goal of buffering a TTL signal. My last edit seems to have taken care of all of that.

Only option 50 ohm ttl line is bad tt, I’ve edited to reflect that. Taking into account the TC output resistance of 22 Ohm according to the datasheet, 16 is typical, 22 max. I’d 50 ohm ttl line like to make this trigger output a bit idiot-proof: Using standard TTL to drive 50 ohms is a problem which goes way back. I’m going to search for a lower capacitance TVS that will hopefully still provide adequate protection.

TTL ohm or 50 ohm cable Posted by scMicropt in forum: If you like, you can reduce R2 a bit to increase the high level voltage, but the more you do this the greater the chance of accidentally destroying the transistor if 50 ohm ttl line short the output 50 ohm ttl line ground this can happen easily if you are connecting it to its load while the output is active.

I have recently been facing roughly the same question so I would be interested to find out how you finally solved things.

Line Driver drives 4 TTL/CMOS signals into 50 ohm loads.

Post as a guest Name. Upon further thought, I have concluded that the basic approach does not meet the requirement for driving a 1 50 ohm ttl line load, and cannot be made to 50 ohm ttl line so. The connection of a 50 ohm load via a 50 ohm cable will transmit TTL signals with good fidelity. The NI box specs for Ioh are either 16 or 24 mA. Would that work, or would oh, break the TC? Use a simple transistor to allow more current to flow.

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Like, now Q1 has to draw 1. EM Fields 16k 2 12 The amplitude of the high level output voltage would be reduced by Vbe of Q1 of approx 0.