Quartz crystal oscillator with double-frequency output
By adopting combined sealing technology and high-order frequency dividers in quartz crystal oscillators, dual-frequency output can be achieved by only one quartz crystal oscillator, solving the problem of only providing a single frequency output in the existing technology and reducing cost and space requirements.
Patent Information
- Application Number
- CN202421834921.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-31
AI Technical Summary
Existing quartz crystal oscillators usually only provide one frequency output, resulting in the need of multiple quartz crystal oscillators in cases where multiple clock frequencies are required, increasing the cost and circuit space requirements.
Using the combined sealing technology, the crystal chip and the IC chip are sealed in one cavity. The function of a high-order frequency divider is realized through the integrated load capacitor and buffer in the IC chip. Only one quartz crystal oscillator can output two frequencies.
It reduces the cost and circuit space requirements, solves the problem that ordinary quartz crystal oscillators can only provide a single frequency output, and realizes the function of dual-frequency output.
Smart Images
Figure CN222868901U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of quartz crystal oscillators, in particular to a quartz crystal oscillator with dual-frequency output. Background Art
[0002] Quartz wafers, which are made of silicon dioxide, have a very stable natural frequency and piezoelectric effect. They are a core material widely used in clock frequency devices. Quartz crystal oscillators are clock frequency generators that use quartz wafers as oscillator sources. Its frequency is determined by the thickness of the quartz wafer. The thinner the quartz wafer, the higher the frequency; conversely, the thicker the quartz wafer, the lower the frequency. However, the circuit has many clock frequency requirements, not fixed frequency points. Ordinary quartz crystal oscillators can usually only provide one frequency output. However, some circuit functional modules do not have a single demand for clock frequency. They require multiple quartz crystal oscillators, which increases both the cost and the space volume of the circuit. How to integrate and package some commonly used clock frequencies together, so that only one quartz crystal oscillator can output two frequencies, has become a difficult problem in the clock oscillator industry. Utility Model Content
[0003] The utility model discloses a quartz crystal oscillator with dual-frequency output, which aims to solve the problem that some circuit function modules have different requirements for clock frequency, and they need multiple quartz crystal oscillators, which increases the cost and the space volume of the circuit. How to integrate and package some commonly used clock frequencies together, and only need to provide one quartz crystal oscillator to output two frequencies, has become a difficult technical problem in the clock oscillator industry.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A quartz crystal oscillator with dual-frequency output, comprising: a base, a first groove is formed on the top of the base, a second groove is formed on the bottom of the first groove, a third groove is formed on the bottom of the second groove, an IC chip is arranged at the bottom of the third groove, the IC chip is electrically connected to the base, a crystal plate is arranged at the bottom of the first groove, the crystal plate is electrically connected to the base;
[0006] The IC chip integrates a load capacitor Cg-Cd, two buffers U4 and U5, and a high-order frequency divider U3. The load capacitor Cg-Cd is electrically connected to the crystal piece.
[0007] This device adopts the sealing technology to seal the crystal piece and IC chip in one cavity, which not only reduces the cost, but also reduces the space volume of the circuit. On the other hand, the frequency output by the inverter U1 is output through the U4 buffer in one way with a frequency of MHz; the other way passes through the U3 high-order divider, and the MHz frequency is divided into .KHz and then buffered for output. Only one quartz crystal oscillator is needed to output two frequencies, which solves the problem that ordinary quartz crystal oscillators can usually only provide one frequency output.
[0008] In a preferred embodiment, it further comprises a binding gold wire, one end of which is connected to the IC chip, and the other end of which is connected to the base.
[0009] In a preferred solution, an electrode is provided on the crystal sheet, and the electrode is connected to the base.
[0010] In a preferred solution, a conductive glue is provided on the quartz crystal sheet, and the conductive glue is used to fix and conduct electricity to the electrode, the quartz crystal sheet and the base.
[0011] In a preferred solution, a gold-plated pad is provided at the bottom of the base, and the gold-plated pad is used for an external circuit board.
[0012] In a preferred solution, a top cover is provided on the top of the base, and the top cover is located above the crystal piece.
[0013] In a preferred solution, the electrode is located above the IC chip.
[0014] As can be seen from the above, a quartz crystal oscillator with dual-frequency output includes: a base, a first groove is formed on the top of the base, a second groove is formed on the bottom of the first groove, a third groove is formed on the bottom of the second groove, an IC chip is arranged at the bottom of the third groove, the IC chip is electrically connected to the base, a crystal plate is arranged at the bottom of the first groove, and the crystal plate is electrically connected to the base;
[0015] The IC chip is integrated with a load capacitor Cg-Cd and two buffers U4 and U5, and a high-order frequency divider U3. The load capacitor Cg-Cd is electrically connected to the crystal plate. The utility model provides a quartz crystal oscillator with dual-frequency output, which has the advantages of reducing costs and reducing the space volume of the circuit. Only one quartz crystal is required to output two frequencies, which solves the technical effect of the common quartz crystal oscillator, which usually can only provide one frequency output. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The utility model is a schematic diagram of the overall structure of a quartz crystal oscillator with dual-frequency output.
[0017] Figure 2 The utility model is a schematic diagram of the bottom structure of a quartz crystal oscillator with dual-frequency output.
[0018] Figure 3 The utility model is a cross-sectional structural schematic diagram of a quartz crystal oscillator with dual-frequency output.
[0019] Figure 4 The utility model is a circuit structure diagram of a quartz crystal oscillator with dual-frequency output.
[0020] In the attached figure: 1. electrode; 2. crystal piece; 3. conductive glue; 4. top cover; 5. base; 6. binding gold wire; 7. IC chip; 8. gold-plated pad. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0023] The quartz crystal oscillator with dual-frequency output disclosed in the utility model is mainly used in some circuit function modules, which have different requirements for clock frequency. They need multiple quartz crystal oscillators, which increases the cost and the space volume of the circuit. How to integrate and package some commonly used clock frequencies together, and only need to provide a quartz crystal oscillator to output two frequencies, has become a difficult scenario in the clock oscillator industry.
[0024] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A quartz crystal oscillator with dual-frequency output includes: a base 5, a first groove is formed on the top of the base 5, a second groove is formed on the bottom of the first groove, a third groove is formed on the bottom of the second groove, an IC chip 7 is arranged at the bottom of the third groove, the IC chip 7 is electrically connected to the base 5, a crystal plate 2 is arranged at the bottom of the first groove, and the crystal plate 2 is electrically connected to the base 5;
[0025] The IC chip 7 integrates a load capacitor Cg-Cd, two buffers U4 and U5, and a high-order frequency divider U3. The load capacitor Cg-Cd is electrically connected to the crystal piece 2.
[0026] This device adopts sealing technology to seal the crystal sheet 2 and IC chip 7 in one cavity. Figure 4 The circuit diagram of the product is shown below. U1, Rd, Rf, Cd, Cg, and Y1 form a three-point oscillation circuit, which is the oscillation source of the product. Among them, Y1 is a crystal piece with electrodes attached, which constitutes a crystal resonator; U1 is a reverse amplifier, which provides amplitude and phase conditions for the oscillation circuit; Rf is a feedback resistor, which makes the reverse amplifier work in the linear amplification area; Rd is an output current limiting resistor, which reduces the excitation power of the crystal resonance; Gg and Cd are the load capacitors of the oscillation circuit, which are also two necessary capacitors to form a three-point oscillation circuit; the frequency output by the inverter U1 is output through the buffer of U4, with a frequency of MHz; the other way is output through the high-order frequency divider of U3, which divides the frequency of MHz into 32.768KHz and then outputs it in a buffer; in the whole circuit, U2 is a voltage stabilizer, which is used to stabilize the voltage of the oscillation circuit, so that the circuit is less affected by the fluctuation of the power supply voltage, which improves the stability of the circuit.
[0027] Reference Figure 1 and Figure 3 In a preferred embodiment, it includes a binding gold wire 6 , one end of the binding gold wire 6 is connected to the IC chip 7 , and the other end of the binding gold wire 6 is connected to the base 5 .
[0028] Reference Figure 1 In a preferred embodiment, an electrode 1 is provided on the crystal sheet 2 , and the electrode 1 is connected to the base 5 .
[0029] Reference Figure 1 and Figure 3 In a preferred embodiment, a conductive glue 3 is provided on the crystal piece 2, and the conductive glue 3 is used to fix and conduct electricity to the electrode 1, the crystal piece 2 and the base 5.
[0030] Reference Figure 1 and Figure 2 In a preferred embodiment, a gold-plated pad 8 is provided at the bottom of the base 5, and the gold-plated pad 8 is used for an external circuit board.
[0031] Reference Figure 3 In a preferred embodiment, a top cover 4 is provided on the top of the base 5 , and the top cover 4 is located above the crystal piece 2 .
[0032] Reference Figure 3 In a preferred embodiment, the electrode 1 is located above the IC chip 7 .
[0033] In summary, the utility model discloses a quartz crystal oscillator with dual-frequency output, comprising: a base 5, a first groove is formed on the top of the base 5, a second groove is formed on the bottom of the first groove, a third groove is formed on the bottom of the second groove, an IC chip 7 is arranged at the bottom of the third groove, the IC chip 7 is electrically connected to the base 5, a crystal plate 2 is arranged at the bottom of the first groove, and the crystal plate 2 is electrically connected to the base 5;
[0034] IC chip 7 is integrated with load capacitor Cg-Cd and two buffers U4 and U5, and high-order frequency divider U3. Load capacitor Cg-Cd is electrically connected to crystal plate 2. The utility model adopts sealing technology to seal crystal plate 2 and IC chip 7 in one cavity, which not only reduces the cost but also reduces the space volume of the circuit. On the other hand, the frequency output by inverter U1 is output through U4 buffer in one way, and the frequency is MHz; the other way is output through U3 high-order frequency divider, and the frequency of MHz is divided into 32.768KHz, and then buffered. Only one quartz crystal is needed to output two frequencies, which solves the problem that ordinary quartz crystal oscillators can usually only provide one frequency output.
[0035] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this. The replacement can be a replacement of part of the structure, device, method step, or a complete technical solution. Equivalent replacement or change based on the technical solution of the utility model and its utility model concept should be included in the protection scope of the utility model.
Claims
1. A quartz crystal oscillator with dual-frequency output, characterized in that: include: A base (5), wherein a first groove is formed at the top of the base (5), a second groove is formed at the bottom of the first groove, a third groove is formed at the bottom of the second groove, an IC chip (7) is arranged at the bottom of the third groove, the IC chip (7) is electrically connected to the base (5), and a crystal piece (2) is arranged at the bottom of the first groove, the crystal piece (2) is electrically connected to the base (5); The IC chip (7) is integrated with a load capacitor Cg-Cd, two buffers U4 and U5, and a high-order frequency divider U3. The load capacitor Cg-Cd is electrically connected to the crystal piece (2).
2. A quartz crystal oscillator with dual-frequency output according to claim 1, characterized in that: It also comprises a binding gold wire (6), one end of the binding gold wire (6) is connected to the IC chip (7), and the other end of the binding gold wire (6) is connected to the base (5).
3. A quartz crystal oscillator with dual-frequency output according to claim 2, characterized in that: An electrode (1) is provided on the crystal sheet (2), and the electrode (1) is connected to the base (5).
4. A quartz crystal oscillator with dual-frequency output according to claim 3, characterized in that: A conductive glue (3) is provided on the crystal sheet (2), and the conductive glue (3) is used to fix and conduct electricity to the electrode (1), the crystal sheet (2) and the base (5).
5. A quartz crystal oscillator with dual-frequency output according to claim 1, characterized in that: A gold-plated pad (8) is provided at the bottom of the base (5), and the gold-plated pad (8) is used for externally connecting a circuit board.
6. A quartz crystal oscillator with dual-frequency output according to claim 1, characterized in that: A top cover (4) is provided on the top of the base (5), and the top cover (4) is located above the crystal piece (2).
7. A quartz crystal oscillator with dual-frequency output according to claim 3, characterized in that: The electrode (1) is located above the IC chip (7).