Anpec Electronics Corporation

Zong-Yu Wu

Kang Sheng

A power clamping circuit with temperature compensation is disclosed. The power clamping circuit, for a system voltage, includes a first diode, a resistor with a positive temperature coefficient, a second diode, a comparator including a negative input terminal coupled to an anode of the first diode and a positive input terminal coupled to the resistor with the positive temperature coefficient, a transistor including a gate coupled to an output terminal of the comparator, a drain coupled to the system voltage and a source coupled to the ground, a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor.

Power clamping circuit with temperature compensation

A battery charging circuit for charging a rechargeable battery and improving operating stability includes a plurality of resistors for generating a first voltage; a first reference voltage source for providing a first reference voltage; an error amplifier for generating a second voltage according to the voltage difference between the first reference voltage and the first voltage; a second reference voltage source for providing a second reference voltage; a modulator for generating a control voltage according to the second reference voltage and the second voltage; a voltage-to-current control unit for generating a control current according to the control voltage; and a current mirror for generating an output current which is equal to a multiple of the control current, wherein the output current and its corresponding output voltage is applied to charge the rechargeable battery.

Growing community of inventors

Changhua County, Taiwan

Zong-Yu Wu