Patent ID: 7557655

Claim:
An apparatus for isolating an input analog signal, comprising: an isolated transformer comprising a primary winding, a sense winding in electromagnetic communication with the primary winding, and a signal winding in electromagnetic communication with the primary winding, wherein the signal winding is isolated from the primary winding by an isolation barrier of the isolated transformer; and an operational amplifier having a first input comprising a combination of the analog input signal and a primary winding signal and a second input comprising a sense winding signal derived from an output of the sense winding, wherein the primary winding signal comprises an output of the operational amplifier, and wherein the signal winding is configured to produce an output analog signal corresponding to the input analog signal at a capture time, wherein the operational amplifier is configured to drive the primary winding at time differential before the capture time, and wherein the time differential is sufficient to allow the compensation amplifier and output analog signal to settle.