Shared crystal oscillator high-speed acquisition circuit
By using a design that shares crystal oscillator pins and clock lines, the problems of long data acquisition time and MCU pin occupation in existing data acquisition circuits are solved, achieving efficient system expansion and low cost, and ensuring the accuracy and consistency of data acquisition.
Patent Information
- Application Number
- CN202422941939.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-30
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-11-30
AI Technical Summary
Existing data acquisition circuits are time-consuming, occupy multiple MCU pins, limit system scalability and flexibility, and result in high costs.
A high-speed acquisition circuit with a shared crystal oscillator is adopted. The crystal oscillator pin and clock line in the shared data acquisition channel are connected in parallel to the same pin of the circuit board chip. The voltage value is reasonably distributed by utilizing the voltage division effect of the parallel resistor, and the voltage fluctuation is smoothed by the parallel capacitor. A quartz crystal is used as a piezoelectric crystal.
It improves the system's scalability and flexibility, reduces the number of components, lowers production costs, ensures minimal clock skew between multiple channels, avoids data loss and corruption, and improves data accuracy.
Smart Images
Figure CN223741742U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of data signal collection and processing, and particularly relates to a common crystal oscillator high-speed collection circuit. BACKGROUND
[0002] The working principle of the data collection channel is based on the piezoelectric effect and resonance phenomenon of crystals. It uses a piezoelectric crystal as the main component of the oscillator. When an electric field or mechanical stress is applied to the piezoelectric crystal, the crystal will undergo a slight deformation, thereby generating an electric charge in the crystal. This electric charge causes mechanical vibrations of the crystal and generates a continuous resonant signal at a specific frequency.
[0003] This vibration frequency is determined by the physical properties of the crystal and is usually in the MHz or GHz range. The data collection channel utilizes the resonance phenomenon of the crystal to stably convert the resonant frequency of the crystal into a high-frequency clock signal.
[0004] The data collection channel is usually composed of a crystal oscillator, an amplifier and a feedback network. The crystal oscillator is responsible for generating the basic oscillation signal, the amplifier amplifies it to the appropriate level, and the feedback network conditions the oscillation signal. By precisely selecting the physical properties of the crystal and designing the circuit parameters, the data collection channel can achieve a high-stability and low-phase-noise output signal.
[0005] The conventional data collection channel currently mainly uses a crystal oscillator circuit, but in the assembly process, it is usually combined with a single pair of a single crystal oscillator circuit and a mainboard in a one-to-one manner. Even when combined in a multiple-to-one manner, to avoid connection interference and other problems, a single mainboard is usually connected in parallel to multiple crystal oscillator circuits, and no interaction is performed on the connection line, so that multiple MCU pins need to be occupied in the circuit design, making it difficult to fully utilize the overall advantages of the circuit. At the same time, due to problems such as heat generation, the multiple-to-one connection method is difficult to promote.
[0006] According to the analysis of the background technology, it is found that the existing collection circuit has the following problems when in use:
[0007] Problem one: the collection circuit takes a long time in data processing, resulting in a decrease in the overall system response speed;
[0008] Problem two: the existing circuit design usually occupies multiple MCU pins, limiting the expandability and flexibility of the system;
[0009] Problem three: due to the problem of low efficiency, a high cost is required to solve the problem, increasing the market competition pressure of the product. UTILITY MODEL CONTENTS
[0010] Therefore, the utility model provides common crystal high -speed acquisition circuit, can solve current existing data acquisition circuit has data processing time long, limit system expansibility and flexibility, lead to use cost higher problem.
[0011] The utility model is realized as follows:
[0012] The utility model provides common crystal high -speed acquisition circuit, including circuit board chip and a plurality of external data acquisition channel, wherein a plurality of external data acquisition channel is connected in parallel on the same pin of circuit board chip through the mode of crystal oscillator pin and clock line in common data acquisition channel.
[0013] On the basis of the above technical scheme, the common crystal high -speed acquisition circuit of the utility model can also be improved as follows:
[0014] Among them, a plurality of external data acquisition channel is completely same, the data acquisition channel main part is analog digital converter, the analog digital converter is 24 bit with ultra -low noise amplifier's analog digital converter of model CS5530.
[0015] Further, the bus of the analog digital converter reserves a sensor self information data output port, a serial data input port, a serial data output port, a serial data communication clock port and an oscillator port, and the sensor self information data output port and the serial data output port are connected with the pins of the circuit board chip.
[0016] Further, the serial data communication clock ports of the plurality of data acquisition channels are connected in parallel and are commonly connected to one pin of the circuit board chip, the serial data input ports of the plurality of data acquisition channels are connected in parallel and are commonly connected to another pin of the circuit board chip, and the oscillator ports of the plurality of data acquisition channels are connected in parallel and are commonly connected to MCU data acquisition pins.
[0017] Further, a resistor is connected in parallel between the serial data communication clock port and one pin of the circuit board chip, a resistor is connected in parallel between the serial data input port and another pin of the circuit board chip, and a capacitor is connected in parallel between the oscillator port and the oscillator.
[0018] The beneficial effects of the above technical scheme are that the parallel resistance is used to protect the external multiple crystal oscillator circuits, the resistance voltage division effect is used to more reasonably allocate the voltage value on the crystal oscillator circuit, the resistance value of the parallel resistance is adjusted according to the number of external crystal oscillator circuits, and the purpose of improving the expansibility and flexibility of the whole system is achieved.
[0019] Further, the oscillator is connected with a 3.3V power supply, and two capacitors are connected in parallel between the power supply port of the oscillator and the power supply.
[0020] The beneficial effect of the above technical solution is that the voltage fluctuation on the oscillator is smoothed, and the voltage in the oscillator is more stable.
[0021] Further, the piezoelectric crystal in the crystal oscillator circuit is a quartz crystal.
[0022] Compared with the prior art, the common crystal oscillator high-speed acquisition circuit has the beneficial effect that the data acquisition channel common crystal oscillator pin and common clock line are set, and different data lines are used for each channel. This design ensures that the clock deviation between multiple channels is minimized and the consistency of the acquisition signal is maintained.
[0023] Through the common clock line, the system can quickly complete the data acquisition of multiple channels within the time of acquiring one channel, thereby effectively solving the data loss problem that may occur after increasing the sampling rate. In addition, this scheme also avoids the data disorder that may be caused by multiple channel cyclic acquisition, reduces the crystal oscillator error, can change the multiple error of the original multiple crystal oscillators into the error value under the single crystal oscillator state, and improves the accuracy of the data.
[0024] In actual application, the technical solution has the advantages that multiple channels share one crystal oscillator, the circuit design is more simple, the number of components is reduced, and the production cost is reduced. At the same time, this design also provides convenience for the maintenance and upgrade of the system, and the user can more easily expand the system. BRIEF DESCRIPTION OF DRAWINGS
[0025] Fig. 1 is a main circuit diagram of a circuit board chip;
[0026] Fig. 2 is a distribution circuit diagram of each crystal oscillator circuit;
[0027] Fig. 3 is an oscillator circuit diagram. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.
[0029] As Figs. 1-3The utility model provides a common crystal oscillation high speed acquisition circuit, including circuit board chip and 8 external data acquisition channels in the structure, its characterized in being that 8 external data acquisition channels are connected in parallel on the same pin of circuit board chip through the mode of crystal oscillation pin and clock line in common data acquisition channel.
[0030] Wherein, in the above scheme, 8 external data acquisition channels are completely same, and the data acquisition channel main part is analog-digital converter, and the analog-digital converter is 24-bit analog-digital converter with super low noise amplifier of model CS5530.
[0031] Further, in the above scheme, the bus of analog-digital converter reserves sensor self information data output port, serial data input port, serial data output port, serial data communication clock port and oscillator port, wherein the oscillator port is externally connected with vibrator, and the sensor self information data output port and serial data output port are bidirectionally connected with the pin of circuit board chip.
[0032] Further, in the above scheme, the serial data communication clock ports of 8 data acquisition channels are connected in parallel and are bidirectionally connected on the PB6 pin of circuit board chip in common, the serial data input ports of 8 data acquisition channels are connected in parallel and are bidirectionally connected on the PB5 pin of circuit board chip in common, and the oscillator ports of 8 data acquisition channels are connected in parallel and are connected on the MCU data acquisition pin in common.
[0033] Further, the sensor self information data output port of acquisition channel 1 is bidirectionally connected with the PB9 pin of circuit board chip, and the serial data output port of acquisition channel 1 is bidirectionally connected with the PB3 pin of circuit board chip.
[0034] The sensor self information data output port of acquisition channel 2 is bidirectionally connected with the PC12 pin of circuit board chip, and the serial data output port of acquisition channel 2 is bidirectionally connected with the PC11 pin of circuit board chip.
[0035] The sensor self information data output port of acquisition channel 3 is bidirectionally connected with the PC10 pin of circuit board chip, and the serial data output port of acquisition channel 3 is bidirectionally connected with the PA11 pin of circuit board chip.
[0036] The sensor self information data output port of acquisition channel 4 is bidirectionally connected with the PA10 pin of circuit board chip, and the serial data output port of acquisition channel 4 is bidirectionally connected with the PA9 pin of circuit board chip.
[0037] The sensor self information data output port of acquisition channel 5 is bidirectionally connected with the PB14 pin of circuit board chip, and the serial data output port of acquisition channel 5 is bidirectionally connected with the PB13 pin of circuit board chip.
[0038] The sensor self-information data output port of the collection channel 6 is connected with the PC6 pin of the circuit board chip in a bidirectional mode, and the serial data output port of the collection channel 6 is connected with the PB15 pin of the circuit board chip in a bidirectional mode;
[0039] The sensor self-information data output port of the collection channel 7 is connected with the PC8 pin of the circuit board chip in a bidirectional mode, and the serial data output port of the collection channel 7 is connected with the PC7 pin of the circuit board chip in a bidirectional mode;
[0040] The sensor self-information data output port of the collection channel 8 is connected with the PA8 pin of the circuit board chip in a bidirectional mode, and the serial data output port of the collection channel 8 is connected with the PC9 pin of the circuit board chip in a bidirectional mode.
[0041] Further, in the above scheme, a resistor is connected in parallel between the serial data communication clock port and the PB6 pin of the circuit board chip, and the other end of the resistor is grounded; a resistor is connected in parallel between the serial data input port and the PB5 pin of the circuit board chip, and the other end of the resistor is grounded; and a capacitor is connected in parallel between the oscillator port and the oscillator.
[0042] Further, in the above scheme, the oscillator is externally connected with a 3.3V power supply, and two capacitors are connected in parallel between the oscillator power supply port and the power supply.
[0043] Further, in the above scheme, the piezoelectric crystal in the crystal oscillator circuit is a quartz crystal.
[0044] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A common crystal oscillator high-speed acquisition circuit, comprising a circuit board chip and a plurality of external data acquisition channels, characterized in that, The multiple external data collection channels are connected in parallel on the same pin of the circuit board chip through the way of sharing the crystal oscillator pin and the clock line in the common data collection channel.
2. The common crystal oscillator high-speed acquisition circuit according to claim 1, characterized in that, The multiple external data collection channels are completely identical, and the data collection channel body is an analog-digital converter.
3. The common crystal oscillator high-speed acquisition circuit according to claim 2, characterized in that, The bus of the analog-digital converter reserves a sensor self-information data output port, a serial data input port, a serial data output port, a serial data communication clock port and an oscillator port; the sensor self-information data output port and the serial data output port are connected with the pins of the circuit board chip.
4. The common crystal oscillator high-speed acquisition circuit according to claim 3, characterized in that, The serial data communication clock ports of the multiple data collection channels are connected in parallel and are commonly connected to one pin of the circuit board chip; the serial data input ports of the multiple data collection channels are connected in parallel and are commonly connected to another pin of the circuit board chip; the oscillator ports of the multiple data collection channels are connected in parallel and are commonly connected to the MCU data collection pin.
5. The common crystal oscillator high-speed acquisition circuit according to claim 3, characterized in that, A resistor is connected in parallel between the serial data communication clock port and the one pin of the circuit board chip; a resistor is connected in parallel between the serial data input port and the another pin of the circuit board chip; a capacitor is connected in parallel between the oscillator port and the oscillator.
6. The common crystal oscillator high-speed acquisition circuit according to claim 5, characterized in that, The oscillator is externally connected with a 3.3V power supply, and two capacitors are connected in parallel between the oscillator power supply port and the power supply.
7. The common crystal oscillator high-speed acquisition circuit according to claim 6, characterized in that, The piezoelectric crystal in the circuit is a quartz crystal.