Patent ID: 11967272
Assignee: NATIONAL CHENG KUNG UNIVERSITY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 4:
5. A sweep voltage generator, comprising:
an output node, used to provide a sweep signal;
a current generating circuit, coupled to the output node, comprising a detection path for detecting an output load variation on the output node, and adjusting the sweep signal provided by the output node based on the output load variation; and
a voltage regulating circuit, coupled to the output node for regulating a voltage the output node,
wherein the current generating circuit comprises:
a fifteenth transistor, having a first terminal receiving the output node, a control terminal, and a second terminal;
a sixteenth transistor, having a first terminal receiving a low voltage, a control terminal receiving a first control signal, and a second terminal coupled to the control terminal of the fifteenth transistor;
a seventeenth transistor, having a first terminal receiving a first reference voltage, a control terminal receiving a second control signal, and a second terminal;
a fourth capacitor, coupled between the second terminal of the sixteenth transistor and the second terminal of the seventeenth transistor;
a fifth capacitor, coupled between the first reference voltage and the second terminal of the seventeenth transistor;
an eighteenth transistor, having a first terminal coupled to the second terminal of the fifteenth transistor, a control terminal receiving a third control signal, and a second terminal coupled to the control terminal of the fifteenth transistor;
a nineteenth transistor, having a first terminal coupled to the second terminal of the seventeenth transistor, a control terminal receiving a light emission control signal, and a second terminal;
a twentieth transistor, having a first terminal coupled to the second terminal of the nineteenth transistor, a control terminal, and a second terminal;
a sixth capacitor, coupled between the second terminal of the seventeenth transistor and the control terminal of the twentieth transistor;
a twenty-first transistor, having a first terminal with a second reference voltage, a control terminal receiving the third control signal, and a second terminal coupled to the second terminal of the nineteenth transistor;
a twenty-second transistor, having a first terminal coupled to the control terminal of the twentieth transistor, a control terminal receiving the first control signal, and a second terminal receiving the low voltage;
a twenty-third transistor, having a first terminal coupled to the second terminal of the twentieth transistor, a control terminal receiving the third control signal, and a second terminal coupled to the control terminal of the twentieth transistor;
a twenty-fourth transistor, having a first terminal coupled to the second terminal of the twentieth transistor, a control terminal receiving the light emission control signal, and a second terminal receiving the low voltage; and
a twenty-fifth transistor, having a first terminal coupled to the second terminal of the fifteenth transistor, a control terminal receiving the light emission control signal, and a second terminal receiving the low voltage.