Rotary data coupler

A rotary data coupler for coupling a digital signal from a transmitter to a receiver, the rotary data coupler comprising:

• a first housing comprising a first transmitter band and a second transmitter band electrically coupled to receive a digital transmit signal;
• and
• a second housing that is rotatable relative to the second housing about a axis of rotation, the second housing comprising:
• a first receiver band positioned opposite the first transmitter band to form a first capacitor;
• a second receiver band positioned opposite the second transmitter band to form a second capacitor;
• a receiver resistor electrically coupled between the first receiver band and the second receiver band;
• and
• a differential amplifier comprising a non-inverting input electrically coupled to the first receiver band and an inverting input electrically coupled to the second receiver band, wherein the differential amplifier is to generate a received signal.

A method of operating a rotary data coupler, the rotary data coupler comprising:

• a transmitter comprising a first transmitter band and a second transmitter band;
• and a receiver comprising a first receiver band electrically coupled to the first transmitter band to form a first capacitor, a second receiver band electrically coupled to the second transmitter band to form a second capacitor, a resistance between the first receiver band and the second receiver band, and a differential amplifier electrically coupled to the first receiver band and the second receiver band, the method comprising:
• rotating the transmitter relative to the receiver;
• providing a digital transmit signal at the first transmitter band and the second transmitter band while the transmitter is rotating relative to the receiver;
• and
• receiving a received signal at an output of the differential amplifier.