D
Doug D.
- Jan 1, 1970
- 0
I'm having difficulty finding a suitable cable for a wired sensor application, and I was wondering if anyone could check my design approach. Basically, my control circuit powers a wired sensor located about 2 meters away. The sensor circuit uses a single-ended op-amp to amplify a 5 MHz transducer signal, and then sends it back to the control circuit where it is digitized.. So, I need 3 wires between the control circuit and the sensor: Vcc, ground, and signal.
Since the cables from multiple sensors will be running next to each other, I thought I should use twisted-triad wire to reduce cross-talk. External EMI shouldn't be a problem, so I don't think shielded cables are necessary. However, I haven't been able to find twisted-triad wire without a jacket or shield. What kind of wire should I use for this? If I used two twisted-pair wires for each sensor, what would I connect the extra wire to?
The sensor has a Vcc bypass capacitor, so I think most of the higher frequency content will be between signal and ground. Since I'm bringing back thesignal and ground wires together, would this be considered a balanced circuit?
Thanks,
Doug
Since the cables from multiple sensors will be running next to each other, I thought I should use twisted-triad wire to reduce cross-talk. External EMI shouldn't be a problem, so I don't think shielded cables are necessary. However, I haven't been able to find twisted-triad wire without a jacket or shield. What kind of wire should I use for this? If I used two twisted-pair wires for each sensor, what would I connect the extra wire to?
The sensor has a Vcc bypass capacitor, so I think most of the higher frequency content will be between signal and ground. Since I'm bringing back thesignal and ground wires together, would this be considered a balanced circuit?
Thanks,
Doug