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公开(公告)号：US20250062756A1
公开(公告)日：2025-02-20
申请号：US18542767
申请日：2023-12-18
Applicant: RichWave Technology Corp.
Inventor： Che-Sheng Chen
IPC: H03K5/08 , H03K3/0233 , H03K5/24 , H03K17/0812
Abstract: A protection circuit including a voltage dividing circuit, a first comparator, a first switch, a second comparator, and a delay and logic circuit is provided. The voltage dividing circuit generates a first divided voltage and a second divided voltage based on a power voltage. The first comparator is configured to compare a reference voltage and the first divided voltage to generate a first comparison result. The second comparator is configured to compare the reference voltage and the second divided voltage to generate a second comparison result. The delay and logic circuit receives the first comparison result and the second comparison result. Wherein, according to a plurality of different states of the first comparison result and the second comparison result, the first switch is turned on to conduct part of current of the power voltage to a reference voltage terminal, or the first switch changes from turn-on to turn-off.
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公开(公告)号：US10551864B2
公开(公告)日：2020-02-04
申请号：US16170060
申请日：2018-10-25
Applicant: RichWave Technology Corp.
Inventor： Che-Sheng Chen , Shun-Nan Tai
Abstract: A bandgap voltage reference circuit configured to generate a bandgap reference voltage is provided. The bandgap voltage reference circuit includes a bandgap current generating circuit, a differential pair circuit and a flipped voltage follower. The bandgap current generating circuit converts the bandgap reference voltage into a bandgap current and generates a first voltage and a second voltage according to the bandgap current. The differential pair circuit is coupled to the bandgap current generating circuit to receive the first voltage and the second voltage and configured to reduce a voltage difference between the first voltage and the second voltage and generate a third voltage. The flipped voltage follower is coupled to the differential pair circuit to receive the third voltage and generates the bandgap reference voltage accordingly.
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公开(公告)号：US20200012308A1
公开(公告)日：2020-01-09
申请号：US16170060
申请日：2018-10-25
Applicant: RichWave Technology Corp.
Inventor： Che-Sheng Chen , Shun-Nan Tai
Abstract: A bandgap voltage reference circuit configured to generate a bandgap reference voltage is provided. The bandgap voltage reference circuit includes a bandgap current generating circuit, a differential pair circuit and a flipped voltage follower. The bandgap current generating circuit converts the bandgap reference voltage into a bandgap current and generates a first voltage and a second voltage according to the bandgap current. The differential pair circuit is coupled to the bandgap current generating circuit to receive the first voltage and the second voltage and configured to reduce a voltage difference between the first voltage and the second voltage and generate a third voltage. The flipped voltage follower is coupled to the differential pair circuit to receive the third voltage and generates the bandgap reference voltage accordingly.
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