A multi-channel RF component power supply fault detection circuit

Abstract

The present invention discloses a multi-channel radio frequency component power supply fault detection circuit, which belongs to the field of electronic information technology. The circuit includes a voltage weighted summation circuit module, which is used to assign different weights to the power supply voltages of multiple radio frequency components and perform weighted summation, wherein each radio frequency component corresponds to an input resistor, and different values of the input resistor are used to assign different weight values to the radio frequency components; an inverting acquisition circuit module, which is used to invert the weighted summation result of the voltage weighted summation circuit module and determine whether the power supply voltage of the channel where each radio frequency component is located is normal through the output code of the analog-to-digital converter. The present invention greatly reduces the complexity of the circuit, reduces the number of digital processor interfaces used, and effectively reduces costs.

Description

Technical Field

[0001] The present invention belongs to the field of electronic information technology, and in particular relates to a multi-channel radio frequency component power supply fault detection circuit. Background Art

[0002] Typically, there are multiple RF components in a radar system, such as receivers, transmitters, frequency sources, and TR components. The power supply provides power supply voltage to each RF component via a power distribution circuit, such as Figure 1 The power supply fault detection circuit is used to detect in real time whether the supply voltage of each RF component is abnormal. If an abnormality is found, it provides a signal to the digital processor, which controls the power supply and distribution circuit to generate protection or switch the power supply line. This can eliminate the fault in a timely manner, restore the RF component to normal operation, and greatly improve the stability and reliability of the radar system.

[0003] Currently, if Figure 2 As shown, the method for detecting RF component power supply failures primarily involves extracting and dividing the supply voltage of each RF component (i.e., the supply voltage of the first RF component, ..., the supply voltage of the Nth RF component shown in the figure). This voltage is then acquired, quantized, and encoded by an analog-to-digital converter (ADC), and then sent to a digital processor for analysis. However, the disadvantage is that multiple ADCs are required, resulting in a complex circuit and numerous supporting components. This occupies a large number of digital processor interfaces, resulting in high cost. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a multi-channel RF component power supply fault detection circuit. By improving the circuit design and introducing an inverting adder circuit based on an operational amplifier, weighted summation analysis is performed on the power supply voltages of multiple RF components. Only one analog-to-digital converter is required to realize fault detection of the power supply voltages of multiple RF components, which greatly reduces the complexity of the circuit, reduces the number of digital processor interfaces used, and effectively reduces costs.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A multi-channel radio frequency component power supply fault detection circuit, comprising:

[0007] A voltage weighted summation circuit module, configured to assign different weights to the supply voltages of multiple RF components and perform weighted summation, wherein each RF component corresponds to an input resistor, and different values of the input resistor are used to assign different weights to the RF components;

[0008] The inverting acquisition circuit module is used to invert the weighted summation result of the voltage weighted summation circuit module and output the code through the analog-to-digital converter to determine whether the power supply voltage of the channel where each RF component is located is normal.

[0009] The beneficial effects of the present invention are:

[0010] The present invention requires fewer analog-to-digital converters and supporting components, has a simple circuit, low cost, and is easy to produce; only one analog-to-digital converter is needed to detect faults in the power supply voltages of multiple RF components, reducing the number of digital processor interfaces occupied; the power supply voltage weights of different RF components vary greatly, the analysis algorithm is simple and reliable, and the power supply fault detection is highly accurate, making it less likely to misjudge or miss a fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of power supply for radio frequency components in the prior art;

[0012] Figure 2 This is a schematic diagram of a power supply fault detection circuit in the prior art;

[0013] Figure 3 This is a schematic diagram of a voltage weighted summation circuit module of the present invention;

[0014] Figure 4 This is a schematic diagram of the inverting acquisition circuit module of the present invention. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and examples.

[0016] The present invention provides a multi-channel RF component power supply fault detection circuit. The core idea is to design the ratio of the resistance values in the circuit to give 1 / 2, 1 / 4, ..., 1 / 2 to the power supply voltage of each RF component. N The weights are then weighted and summed, and the resulting voltage is converted to analog-to-digital. With these weights, the supply voltage of each RF component corresponds to the value of each bit in the quantized code after analog-to-digital conversion. By analyzing the quantized code, it is possible to determine whether the supply voltage of each RF component is normal. Specifically, the multi-channel RF component power supply fault detection circuit can be divided into two parts: the voltage weighted summation circuit module and the inverting acquisition circuit module.

[0017] The function of the voltage weighted summation circuit module is to perform weighted summation of the supply voltages of multiple RF components. The circuit schematic is shown in the figure. Figure 3 The input signal is the first RF component supply voltage u1, the second RF component supply voltage u2, and the Nth RF component supply voltage u N , the output signal is the first output voltage u o1 The circuit composition includes the first resistor R1, the second resistor R2 and the Nth resistor R N , the first feedback resistor R f1The first RF component supply voltage u1, the second RF component supply voltage u2, and the Nth RF component supply voltage u N Input the first resistor R1, the second resistor R2 and the Nth resistor R N , the first resistor R1, the second resistor R2 until the Nth resistor R N are connected in parallel to the inverting terminal of the first operational amplifier U1, the first feedback resistor R f1 Connected across the inverting terminal and output terminal of the first operational amplifier U1, the first output voltage u o1 The voltage is outputted through the output terminal of the first operational amplifier U1, and the non-inverting terminal of the first operational amplifier U1 is grounded. The values of the multiple input resistors in the voltage weighted summation circuit module satisfy the following relationship:

[0018] ,

[0019] Where, R1, R2, R N Corresponding to the values of the first, second, ..., Nth resistors, The principle of this setting is that each bit of the analog-to-digital converter output code corresponds to 1 / 2, 1 / 4, ..., 1 / times the reference voltage, by setting corresponding weights for the supply voltages of different RF components in the weighted summation circuit, the second output voltage u o2 After analog-to-digital conversion, it directly corresponds to each bit in the code; the function of the feedback resistor is to determine the gain of the first operational amplifier U1 together with the first resistor to the Nth resistor.

[0020] Based on this, the first output voltage of the weighted summation circuit is:

[0021] ,

[0022] Since the RF power supply voltage u of each RF component is consistent, and combined with the above resistance ratio, we can get:

[0023] u o1 =-(1 / 2+1 / 4+…+1 / 2 N )u,

[0024] Wherein, u represents the supply voltage of the RF component; thereby, the weighted summation function of the supply voltages of multiple RF components is realized.

[0025] The function of the inverting acquisition circuit module is to convert the first output voltage u generated by the voltage weighted summation circuit module into o1 Inverted and sent to the analog-to-digital converter for acquisition and processing. The circuit schematic is shown in Figure 4 Specifically, the input signal of the inverting acquisition circuit module is the first output voltage u of the voltage weighted summation circuit module.o1 The output signal is N-bit coded. The circuit composition includes a feedforward resistor R g2 , the second feedback resistor R f2 , the second operational amplifier U2 and the analog-to-digital converter. The first output voltage u o1 Input to feedforward resistor R g2 , feedforward resistor R g2 Connected to the inverting terminal of the second operational amplifier U2, the second feedback resistor R f2 The output terminal of the second operational amplifier U2 outputs a second output voltage u o2 , connected to the input of the analog-to-digital converter, and the non-inverting terminal of the second operational amplifier U2 is grounded. g2 and the second feedback resistor R f2 The following relationship is satisfied in terms of value:

[0026] ,

[0027] Since the second output voltage , take R f2 =R g2 Can make u o2 =-u o1 , that is, the inverse phase is equal, so that the analog-to-digital conversion is full-scale conversion, and the quantization accuracy of the analog-to-digital converter is maximized.

[0028] By reading the quantized code value of the analog-to-digital converter, it can be determined whether all the detected channels are working normally. o2 Through weighted summation and inversion acquisition of two modules, the second output voltage u of the analog-to-digital converter is input. o2 =(1 / 2+1 / 4+…+1 / 2 N )u, where u is the RF component supply voltage. After sampling and quantization by the analog-to-digital converter, each RF component voltage corresponds to each bit in the quantized code. If all bits in the code value are "1," the supply voltage of all tested channels is normal. If a bit in the code value is "0," the corresponding channel has no supply voltage.

[0029] The number of channels that this multi-channel RF component power supply fault detection circuit can detect is limited by the number of quantization bits (i.e., resolution) of the analog-to-digital converter. The maximum number of detectable channels cannot exceed the quantization bits of the analog-to-digital converter. When using this circuit, please note that the supply voltage of each channel to be tested must be consistent and must be consistent with the reference voltage of the analog-to-digital converter. If the system has multiple supply voltages, these can be grouped by voltage and tested separately using this power supply fault detection circuit.

[0030] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-channel radio frequency component power supply fault detection circuit, characterized in that: include: A voltage-weighted summation circuit module, configured to assign different weights to the supply voltages of multiple RF components and perform weighted summation, wherein each RF component corresponds to an input resistor, and different values of the input resistor are used to assign different weight values to the RF components; wherein the voltage-weighted summation circuit module includes a first feedback resistor, a first operational amplifier, and multiple input resistors, wherein the multiple input resistors are connected in parallel to the inverting terminal of the first operational amplifier, and the first feedback resistor is connected across the inverting terminal and the output terminal of the first operational amplifier; An inverting acquisition circuit module is used to invert the weighted summation result of the voltage weighted summation circuit module and determine whether the power supply voltage of the channel where each RF component is located is normal through the output code of the analog-to-digital converter; wherein, the inverting acquisition circuit module includes a feedforward resistor, a second feedback resistor, a second operational amplifier and an analog-to-digital converter, the feedforward resistor is connected to the inverting terminal of the second operational amplifier, the second feedback resistor is connected across the inverting terminal and the output terminal of the second operational amplifier, and the output terminal of the second operational amplifier is connected to the analog-to-digital converter.

2. A multi-channel RF component power supply fault detection circuit according to claim 1, characterized in that: The values of multiple input resistors satisfy the following relationship: ， Where, R1, R2, R N Corresponding to the values of the first, second, ..., Nth resistors, The value of the corresponding first feedback resistor; The first RF component power supply voltage, the second RF component power supply voltage, and finally the Nth RF component power supply voltage are respectively input into the first resistor, the second resistor, and finally the Nth resistor.

3. The multi-channel RF component power supply fault detection circuit according to claim 2, characterized in that: The first output voltage is outputted via the output terminal of the first operational amplifier, and the non-inverting terminal of the first operational amplifier is grounded, wherein the first output voltage is: ， Where u1, u2…, u N Corresponding to the first, second, ..., Nth RF component supply voltages respectively.

4. The multi-channel RF component power supply fault detection circuit according to claim 3, characterized in that: The first RF component supply voltage, the second RF component supply voltage, and the Nth RF component supply voltage are all the same, which is u. Then u o1 =-(1 / 2+1 / 4+…+1 / 2 N )u.

5. The multi-channel RF component power supply fault detection circuit according to claim 3, characterized in that: Feedforward resistor R g2 and the second feedback resistor R f2 The following relationship is satisfied in terms of value: 。 6. The multi-channel RF component power supply fault detection circuit according to claim 5, characterized in that: The output terminal of the second operational amplifier outputs a second output voltage, which is connected to the input terminal of the analog-to-digital converter. The first output voltage and the second output voltage are equal and inversely proportional.

7. The multi-channel RF component power supply fault detection circuit according to claim 6, characterized in that: The analog-to-digital converter is used to encode the second output voltage and determine whether the power supply voltage of each radio frequency component is normal by analyzing the encoded value.

8. The multi-channel RF component power supply fault detection circuit according to claim 7, characterized in that: The quantized code value of the analog-to-digital converter corresponds to the supply voltage of each RF component. If the bit where the code value is located is "0", the supply voltage of the RF component corresponding to the bit is abnormal.

9. The multi-channel RF component power supply fault detection circuit according to claim 8, characterized in that: The number of channels that can be detected by the circuit does not exceed the number of quantization bits of the analog-to-digital converter.

10. The multi-channel RF component power supply fault detection circuit according to claim 9, characterized in that: The supply voltage of each RF component is consistent with the reference voltage of the analog-to-digital converter.

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