Linear voltage generating device for testing performance of power supplies
AssigneesHONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., Hon Hai Precision Industry Co., Ltd.
InventorLing-Yu Xie
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Abstract
A linear voltage generating device for testing performance of a power supply includes a comparator circuit, an analog to digital (A/D) conversion circuit, and an amplifier circuit. The comparator circuit is configured for receiving a pulse width modulation (PWM) signal, and comparing the PWM signal with a reference voltage to output a filtered PWM signal. The A/D conversion circuit is configured for receiving the filtered PWM signal, and converting the filtered PWM signal to a linear digital signal. The amplifier circuit is configured for receiving the linear digital signal, and outputting an amplified linear digital signal to an electric load electrically coupled to the power supply.
Claims7
A linear voltage generating device for testing performance of a power supply, comprising:
- a comparator circuit for receiving a pulse width modulation (PWM) signal, and comparing the PWM signal with a reference voltage to output a filtered PWM signal;
- an analog to digital (A/D) conversion circuit for receiving the filtered PWM signal, and converting the filtered PWM signal to a linear digital signal;
- and
- an amplifier circuit for receiving the linear digital signal, and outputting an amplified linear digital signal to an electric load electrically coupled to the power supply;
- wherein the amplifier circuit comprises a second amplifier, and a fourth resistor;
- a non inverting input terminal of the second amplifier is adapted to receive the linear digital signal;
- an inverting input terminal of the second amplifier is electrically coupled to an output terminal of the second amplifier via the fourth resistor;
- the second amplifier output terminal is adapted to output the amplified linear digital signal;
- a voltage level of the second amplifier output terminal is equal to a voltage level of the second amplifier non inverting input terminal;
- and a current of the second amplifier output terminal is amplified.
Dependencies are inferred from the claim text.