Abstract: Methods and systems for emulating high side current of a power switch including low and high side switches. The method includes generating, with a low side current sensor, a low side current signal for the low side switch when the power switch is in a low state. The method also includes generating, with a first transconductance amplifier, an emulated current signal based on an input voltage of the power switch. The method further includes generating, with a buffer, a fixed reference voltage by sampling the low side current signal when the power switch changes from the low state to a high state. The method also includes generating, with a capacitor, an emulated voltage based on the emulated current signal and the fixed reference voltage. The method further includes, generating, with a second transconductance amplifier, a high side current signal for the high side switch based on the emulated voltage.

Abstract: Methods and systems for emulating high side current of a power switch including low and high side switches. The method includes generating, with a low side current sensor, a low side current signal for the low side switch when the power switch is in a low state. The method also includes generating, with a first transconductance amplifier, an emulated current signal based on an input voltage of the power switch. The method further includes generating, with a buffer, a fixed reference voltage by sampling the low side current signal when the power switch changes from the low state to a high state. The method also includes generating, with a capacitor, an emulated voltage based on the emulated current signal and the fixed reference voltage. The method further includes, generating, with a second transconductance amplifier, a high side current signal for the high side switch based on the emulated voltage.

Abstract: A driver apparatus for offset cancel and an amplifier apparatus for offset cancel thereof are provided. The amplifier apparatus for offset cancel includes an offset cancellation unit and an amplifier unit. The offset cancellation unit determines the timing and state of an output control signal according to a latch signal and a polarity signal in a panel display device. The amplifier unit is coupled to the offset cancellation unit, so as to switch an input terminal signal and a feedback path of the amplifier unit according to the control signal output by the offset cancellation unit, thereby canceling the offsets of the amplifier apparatus.