Data and power isolation barrier

A circuit, comprising:

• a modulator having an input and an output;
• an oscillator coupled to the input of the modulator;
• a transmitter having an input and first and second outputs, the input of the transmitter coupled to the output of the modulator;
• a transformer driver having first and second terminals;
• a first capacitor coupled between the first output of the transmitter and the first terminal of the transformer driver;
• and
• a second capacitor coupled between the second output of the transmitter and the second terminal of the transformer driver.

A circuit, comprising:

• a modulator having an input and an output;
• an oscillator coupled to the input of the modulator;
• a transmitter having an input and first and second outputs, the input of the transmitter coupled to the output of the modulator;
• a first capacitor having first and second terminals, the first terminal of the first capacitor coupled to the first output of the transmitter;
• a second capacitor having first and second terminals, the first terminal of the second capacitor coupled to the second output of the transmitter;
• a rectifier having first and second rectifier inputs and an output, the first rectifier input coupled to the second terminal of the first capacitor and the second rectifier input coupled to the second terminal of the second capacitor;
• and
• a ground terminal configured to be coupled to a center tap of a first winding of a transformer, the first rectifier input configured to be coupled to a first terminal of the first winding and the second rectifier input configured to be coupled to a second terminal of the first winding.

An apparatus, comprising:

• a transformer having a primary winding and a secondary winding, the primary winding having first and second terminals and a center tap, and the secondary winding having first and second terminals and a center tap, the center tap of the primary winding coupled to a supply voltage terminal, and the center tap of the secondary winding providing an isolated ground;
• a first data transfer circuit coupled to the first and second terminals of the primary winding;
• a second data transfer circuit coupled to the first and second terminals of the secondary winding;
• and
• a push-pull circuit coupled to the first and second terminals of the primary winding.