Switch current sensors

A switch current sensor, comprising:

• means for summing;
• first means for sensing current having a first input and a first output to be configured to be coupled (M) at the first input to a conductor, and coupled at the first output to the means for summing;
• and
• second means for sensing current having a second input and a second output to be configured to be coupled (M) at the second input to the conductor and coupled at the second output to the means for summing,
• wherein the means for summing circuit is configured to aggregate the first output of the first means for sensing current and the second output of the second means for sensing current to produce a voltage waveform that is proportional to a switch current configured to flow in the conductor, the voltage waveform including a direct current (DC) component and steady-state alternating current (AC) components of the switch current,
• wherein the first means for sensing current comprises:
• a first means for integrating and a means for absolute value average detecting, which together are configured to produce the DC component of the switch current, and
• wherein the second means for sensing current comprises:
• a second coil having second coil output terminals,
• a second coil termination having second coil termination terminals and coupled at the second coil termination terminals across the second coil output terminals,
• a second means for integrating having second means for integrating input terminals and a second means for integrating output terminal and coupled at the second means for integrating input terminals across the second coil output terminals, in parallel with the second coil termination,
• second means for DC canceling having a second means for DC canceling input and a second means for DC canceling output and coupled at the second means for canceling input to the second means for integrating output terminal and coupled at the second means for DC canceling output to the means for summing, and
• means for adjusting gain or bandwidth having a means for adjusting input and a means for adjusting output, wherein the second means for DC canceling output is coupled at the means for adjusting input to the second means for DC canceling output and at the means for adjusting output to the means for summing.

A switch current sensor, comprising:

• a summing circuit;
• a first-type switch current sensor subcircuit comprising:
• a first coil configured to be coupled to a conductor;
• a first-type integrator circuit having first-type integrator input and a first integrator output and coupled at the first-type integrator input to the first coil;
• a first direct current (DC) canceling circuit having a first DC canceling input and a first DC canceling output and coupled at the first DC canceling input to the first integrator output;
• an absolute value average detector circuit having an absolute value average input and an absolute value average output, coupled at the absolute value average input to the first DC canceling output, and coupled at the absolute value average output to the summing circuit,
• wherein the first-type integrator circuit and the absolute value average detector circuit are together configured to produce a DC component of the switch current configured to flow in the conductor;
• and
• at least one second-type switch current sensor subcircuit comprising:
• a second coil configured to be coupled to the conductor;
• a second-type of integrator circuit having a second-type integrator input and a second integrator output and coupled at the second-type integrator input to the second coil;
• a second DC canceling circuit having a second DC canceling input and a second DC canceling output, coupled at the second DC canceling input to the second integrator output, and coupled at the second DC canceling output to the summing circuit, and
• at least one gain or bandwidth adjustment circuit having an adjustment circuit input and an adjustment circuit output, wherein the second DC canceling output is coupled to the adjustment circuit input and the adjustment circuit output is coupled to the summing circuit,
• wherein the summing circuit is configured to aggregate the absolute value average output and the second DC canceling output to obtain a voltage waveform that is proportional to the switch current configured to flow in the conductor, the voltage waveform including the DC component and a steady-state alternating current (AC) component of the switch current.