Patent ID: 11906555
Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 7:
8. A system for emulating a high side current of a power switch including a low side switch and a high side switch, the system comprising:
a low side current sensor configured to generate a low side current signal for the low side switch when the power switch is in a low state; and
a high side current emulator including:
a first transconductance amplifier configured to generate an emulated current signal based on an input voltage of the power switch,
a buffer configured to generate a fixed reference voltage by sampling the low side current signal when the power switch changes from the low state to a high state,
an emulator capacitor configured to generate an emulated voltage based on the emulated current signal and the fixed reference voltage, and
a second transconductance amplifier configured to generate a high side current signal for the high side switch based on the emulated voltage.