i have a 8GHz differential clock to convert to single ended. Is taking one end of the clock enough? what are the risks of doing so?
Electronic – Differential to single ended digital signal
circuit-designdifferentialsingle-ended
Related Solutions
It is possible that I have misunderstood the requirement - but if not...
The vintage way of getting differential audio signals from a single-ended input consisted of merely using an audio frequency transformer, usually a 2 pin input 3 pin output little thing, with a 1:1 turns ratio.
The single-ended signal feeds the transformer input, and the output side is a differential signal pair you can bias to wherever you need it to be - connect the middle pin of the output to ground, and the differential signal is ground-referenced.
In addition, a turns ratio other than 1:1 allows impedance matching / voltage gain if desired.
Thermocouple circuits are just loops of wire, and in industrial situations may be rather long loops of wire. In this case they are subject to what is called common-mode noise, in particular high-voltage induced AC.
The idea being any induced noise will appear essentially the same on both wires, and the differential amplifier will subtract it out.
Thus differential amplifiers provide a much cleaner signal than a single ended amplifier (with one side of the input tied to ground). The ability of the differential amplifier to filter out common-mode noise is a parameter called the CMRR (common-mode rejection ratio).
Here is a thermocouple system using a number of Linear Technology parts. The differential amplifier is the LT2057 (shaded).
Related Topic
- Electrical – Single ended to differential amplifier workings
- Electronic – Efficiency of obtaining differential signalling from a single-ended manufactured transducers
- Electronic – Differential to single ended
- Electronic – Differential to single ended circuit
- Electrical – Single ended to differential conversion with voltage divider
- Electrical – Differential to single-ended converter
Best Answer
Unless you have experience with common-mode noise, modelling coax, stripline, microstrip, ground effects and understand the group delay distortion effects of unequal skew paths down to the millimeter and know what an eye pattern looks like and how to optimize, you can easily destroy the integrity of a data signal as you suggested.
NB7VQ14MMNG is a popular chip for selecting external Group Delay equalization for Differential In and Out, but it does show a single-ended output in a simple block diagram. These might be useful for SMA connected test points to a single-channel DSO