One-pin crystal oscillator driven through a general purpose input/output device
US-9197157-B1 · Nov 24, 2015 · US
Method and circuit for exciting a crystal oscillation circuit
US2018337635A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018337635-A1 |
| Application number | US-201715635635-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 28, 2017 |
| Priority date | May 16, 2017 |
| Publication date | Nov 22, 2018 |
| Grant date | — |
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- Title
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Abstract
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A method and a circuit for exciting a crystal oscillation circuit are disclosed herein. The crystal oscillation circuit comprising: charging, with a charging circuit, a voltage-controlled oscillator; providing, with the voltage-controlled oscillator, an exciting signal; blocking, with a direct current blocking capacitor, direct current from the voltage-controlled oscillator to the crystal oscillation circuit; and exciting, with the exciting signal, the crystal oscillation circuit. The circuit for exciting a crystal oscillation circuit, comprising: a charging circuit; a voltage-controlled oscillator coupled to the charging circuit and configured to provide an exciting signal to the crystal oscillation circuit; and a direct current blocking capacitor connected between the voltage-controlled oscillator and the crystal oscillation circuit and configured to block direct current from the voltage-controlled oscillator.
First claim
Opening claim text (preview).
What is claimed is: 1 . A method for exciting a crystal oscillation circuit, comprising: charging, with a charging circuit, a voltage-controlled oscillator; providing, with the voltage-controlled oscillator, an exciting signal; blocking, with a direct current blocking capacitor, direct current from the voltage-controlled oscillator to the crystal oscillation circuit; and exciting, with the exciting signal, the crystal oscillation circuit. 2 . The method of claim 1 , wherein the charging circuit further comprises a resistor and a capacitor, and wherein the capacitor is connected in parallel to the resistor via a switch. 3 . The method of claim 2 , wherein an output voltage of the charging circuit is linear voltage increasing from 0. 4 . The method of claim 3 , wherein frequency of the voltage-controlled oscillator varying with the output voltage of the charging circuit and an oscillation frequency of the crystal oscillation circuit falls within a frequency range from a minimum frequency of the voltage controlled oscillator to a maximum frequency of the voltage controlled oscillator. 5 . The method of claim 1 , wherein the crystal oscillation circuit further comprises an output clock connected to the voltage-controlled oscillator and configured to control an oscillation time for the voltage-controlled oscillator. 6 . A circuit for exciting a crystal oscillation circuit, comprising: a charging circuit; a voltage-controlled oscillator coupled to the charging circuit and configured to provide an exciting signal to the crystal oscillation circuit; and a direct current blocking capacitor connected between the voltage-controlled oscillator and the crystal oscillation circuit and configured to block direct current from the voltage-controlled oscillator. 7 . The circuit of claim 6 , wherein the charging circuit further comprises a resistor and a capacitor, and wherein the capacitor is connected in parallel to the resistor via a switch. 8 . The circuit of claim 7 , wherein an output voltage of the charging circuit is linear voltage increasing from 0. 9 . The circuit of claim 8 , wherein frequency of the voltage-controlled oscillator varying with the output voltage of the charging circuit and an oscillation frequency of the crystal oscillation circuit falls within a frequency range from a minimum frequency of the voltage controlled oscillator to a maximum frequency of the voltage controlled oscillator. 10 . The circuit of claim 6 , wherein the crystal oscillation circuit further comprises an output clock connected to the voltage-controlled oscillator and configured to control an oscillation time for the voltage-controlled oscillator.
Assignees
Inventors
Classifications
Locking of an oscillator by injecting an input signal directly into the oscillator · CPC title
Pierce oscillator · CPC title
the means delivering several selected voltages or currents · CPC title
including measures to switch a capacitor · CPC title
Colpitts oscillator · CPC title
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Frequently asked questions
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- What does patent US2018337635A1 cover?
- A method and a circuit for exciting a crystal oscillation circuit are disclosed herein. The crystal oscillation circuit comprising: charging, with a charging circuit, a voltage-controlled oscillator; providing, with the voltage-controlled oscillator, an exciting signal; blocking, with a direct current blocking capacitor, direct current from the voltage-controlled oscillator to the crystal oscil…
- Who is the assignee on this patent?
- Beken Corp
- What technology area does this patent fall under?
- Primary CPC classification H03B5/30. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Nov 22 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).