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US 2024/0388253 A1Published application
Reducing Startup Time In A Crystal Oscillator
AssigneeTexas Instruments Incorporated
InventorANIMESH PAUL
Life of this patent
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Abstract
An oscillator apparatus, including a first node adapted to be coupled to a first terminal of a crystal oscillator; a second node adapted to be coupled to a second terminal of the crystal oscillator; a transconductance circuit; a first switch coupled between the first node and the second node; and a second switch coupled between the transconductance circuit and the second node.
Claims21
An electronic circuit comprising:
- first and second input terminals;
- an intermediate node coupled between the first and second input terminals;
- and
- a controller configured to:
- at a first time, couple the first and second input terminals to cause a first voltage at the first input terminal to propagate to the second input terminal, and
- at a second time after the first time, couple the intermediate node to the second input terminal to cause a voltage drop at the second input terminal while maintaining the first voltage at the first input terminal, wherein the intermediate node has a second voltage at the second time, and wherein a difference between the first voltage and the second voltage is less than a rail-to-rail voltage.
3 more elements
An electronic circuit comprising:
- first and second input terminals;
- a first switch coupled between the first and second input terminals;
- a first transistor having a control terminal, a first current path terminal coupled to the first input terminal, and second current path terminal;
- a second switch coupled between the second input terminal and the control terminal of the first transistor;
- a first resistor coupled between the control terminal of the first transistor and the first current path terminal of the first transistor;
- and
- a second resistor coupled between the control terminal of the first transistor and the second current path terminal of the first transistor.
4 more elements
Dependencies are inferred from the claim text.