Positive and negative simulation power supply structure of tower ground screen analyzer

Abstract

The utility model discloses a positive and negative simulation power supply structure of a tower ground grid analyzer, which comprises a boost charge pump, an inverted charge pump, a positive LDO voltage stabilizer and a negative LDO voltage stabilizer, an output end Vout + pin of the boost charge pump is connected to an input end VINN + pin of the inverted charge pump, the output end Vout + pin of the boost charge pump is connected with the positive LDO voltage stabilizer, and the output end VINN + pin of the inverted charge pump is connected with the negative LDO voltage stabilizer. The positive LDO voltage stabilizer is connected to the positive output end of the power supply, a Vout + pin of the output end of the anti-phase charge pump is connected with the negative LDO voltage stabilizer, and the negative LDO voltage stabilizer is connected to the negative output end of the power supply. The beneficial effects of the utility model are that a power supply scheme of converting positive voltage into positive and negative voltage can be established through simple resistors and capacitors, and the input voltage can be higher than the output voltage and can also be lower than the output voltage. And the output positive and negative voltage passes through the LDO and becomes a direct-current stabilized power supply. The chip is small in area and extremely small in required space, and can be completely applied to a circuit board with a compact area.

Description

Technical Field

[0001] The utility model relates to a positive and negative analog power supply structure of a tower ground network analyzer, belonging to the technical field of power grids. Background Art

[0002] The analog board of a tower ground network receiver requires a ±5V power supply to power the analog chip. To ensure the signal accuracy of the analog chip, the ripple of its power supply needs to be considered. A good power supply can minimize the ripple. Currently, the existing positive-to-positive and negative conversion schemes on the market are all based on the DCDC switching power supply mode, which generates high-frequency switching signals and is difficult to be completely filtered. Therefore, a "clean" power supply scheme is needed to ensure the accuracy of the output signal of the analog chip.

[0003] This technology adopts a positive-to-positive and negative conversion scheme based on LDO. As is well known, LDO, as a DC regulated power supply, has very small ripple and is the best choice for analog power supply. However, LDO cannot directly convert positive voltage into negative voltage, so ordinary LDO cannot meet the requirements of positive and negative power supplies. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a positive and negative analog power supply structure of a tower ground network analyzer. This structure can build a power supply scheme for converting positive voltage into positive and negative voltages through simple resistors and capacitors. Not only can the input voltage be higher than the output voltage, but it can also be lower than the output voltage. Moreover, the positive and negative voltages output are regulated by LDO to become a DC regulated power supply. The chip has a small area and requires very little space, and can be fully used on a circuit board with a compact area.

[0005] The utility model is realized through the following scheme: A positive and negative analog power supply structure of a tower ground network analyzer includes a boost charge pump, an inverting charge pump, a positive LDO voltage regulator, and a negative LDO voltage regulator. The output terminal V out + pin of the boost charge pump is connected to the input terminal V IN_N + pin of the inverting charge pump. The output terminal V out + pin of the boost charge pump is connected to the positive LDO voltage regulator. The positive LDO voltage regulator is connected to the positive power supply output terminal. The output terminal V out + pin of the inverting charge pump is connected to the negative LDO voltage regulator. The negative LDO voltage regulator is connected to the negative power supply output terminal.

[0006] The output terminal of the positive LDO voltage regulator is connected to the ADJ+ port and the BYP+ port. The ADJ+ port and the BYP+ port are connected to the positive power supply output terminal.

[0007] The output terminal of the negative LDO regulator is connected to the ADJ+ port and the BYP+ port, and the ADJ+ port and the BYP+ port are connected to the power negative output terminal.

[0008] The beneficial effects of the present utility model are as follows:

[0009] The positive and negative analog power supply structure of a tower grounding grid analyzer of the present utility model can build a power supply scheme that converts positive voltage into positive and negative voltages through simple resistors and capacitors. Not only can the input voltage be higher than the output voltage, but it can also be lower than the output voltage. Moreover, the positive and negative voltages output are regulated by an LDO, becoming a DC regulated power supply. The chip area is small and the required space is also extremely small, and it can be fully used on a circuit board with a compact area. Description of the Drawings

[0010] Figure 1 It is the internal topology diagram of the positive and negative analog power supply structure of a tower grounding grid analyzer of the present utility model.

[0011] Figure 2 It is the schematic diagram of the LDO negative output voltage regulation of the positive and negative analog power supply structure of a tower grounding grid analyzer of the present utility model.

[0012] Figure 3 It is the schematic diagram of the LDO positive output voltage regulation of the positive and negative analog power supply structure of a tower grounding grid analyzer of the present utility model.

[0013] Figure 4 It is the calculation formula for the negative voltage output regulation of the positive and negative analog power supply structure of a tower grounding grid analyzer of the present utility model.

[0014] Figure 5 It is the calculation formula for the positive voltage output regulation of the positive and negative analog power supply structure of a tower grounding grid analyzer of the present utility model.

[0015] Figure 6 It is the circuit connection diagram of the positive and negative analog power supply structure of a tower grounding grid analyzer of the present utility model.

[0016] Figure 7 It is the output voltage effect diagram of the positive and negative analog power supply structure of a tower grounding grid analyzer of the present utility model.

[0017] In the figure: 1 is a boost charge pump, 2 is an inverting charge pump, 3 is a positive LDO regulator, 4 is a negative LDO regulator, 5 is the power positive output terminal, and 6 is the power negative output terminal. Detailed Implementation Modes

[0018] The following further describes the present utility model in conjunction with Figures 1-7 However, the protection scope of the present utility model is not limited to the above content.

[0019] Reference Figure 1 , a positive and negative analog power supply structure of a tower grounding grid analyzer, including a boost charge pump 1, an inverting charge pump 2, a positive LDO voltage regulator 3, and a negative LDO voltage regulator 4. The output terminal V out + pin of the boost charge pump 1 is connected to the input terminal V IN_N + pin of the inverting charge pump 2. The output terminal V out + pin of the boost charge pump 1 is connected to the positive LDO voltage regulator 3, and the positive LDO voltage regulator 3 is connected to the positive power output terminal 5. The output terminal V out + pin of the inverting charge pump 2 is connected to the negative LDO voltage regulator 4, and the negative LDO voltage regulator 4 is connected to the negative power output terminal 6.

[0020] The output terminal of the positive LDO voltage regulator 3 is connected to the ADJ+ port and the BYP+ port. The ADJ+ port and the BYP+ port are connected to the positive power output terminal 5. The output terminal of the negative LDO voltage regulator 4 is connected to the ADJ+ port and the BYP+ port. The ADJ+ port and the BYP+ port are connected to the negative power output terminal 6. After the positive and negative voltages are generated, the output voltage of LDO+ is adjusted through ADJ+ and BYP+; the output voltage of LDO- is adjusted through ADJ- and BYP-.

[0021] The operation process is as follows:

[0022] The positive power supply of 12V is input to the V IN_P pin and the EN + , EN - pins, starting the positive and negative voltage outputs and powering the boost charge pump 1. The output terminal Vout+ pin of the boost charge pump 1 is connected to the input terminal V IN_N + pin of the inverting charge pump 2. At this time, the positive and negative voltages are generated. Finally, through BYP + , ADJ + and BYP - , ADJ - respectively adjust the output voltage values. Its internal circuit diagram is as shown in Figure 2 , Figure 3 .

[0023] The resistance values of R1 and R2 are related to the output voltage, and its formula is as shown in Figure 4 , Figure 5 .

[0024] The circuit connection diagram is as shown in Figure 6 .

[0025] The output voltage effect diagram using this structure is referred to Figure 7 .

[0026] Although the technical solutions of the present utility model have been described and enumerated in detail, it should be understood that for those skilled in the art, making modifications to the above embodiments or adopting equivalent alternative solutions are obvious to those skilled in the art. These modifications or improvements made without departing from the spirit of the present utility model all fall within the scope of protection required by the present utility model.

Claims

1. A positive and negative analog power supply structure of a tower ground network analyzer, comprising a boost charge pump (1), an inverting charge pump (2), a positive LDO regulator (3) and a negative LDO regulator (4), wherein the output terminal V out + pin is connected to the input terminal V of the inverting charge pump (2) IN_N + pin, the output terminal of the boost charge pump (1) V out The + pin is connected to the positive LDO regulator (3), the positive LDO regulator (3) is connected to the positive output terminal (5) of the power supply, and the output terminal V out The + pin is connected to the negative LDO voltage regulator (4), and the negative LDO voltage regulator (4) is connected to the negative output terminal (6) of the power supply.

2. The positive and negative analog power supply structure of a tower ground network analyzer according to claim 1 is characterized in that: The output end of the positive LDO voltage regulator (3) is connected to an ADJ+ port and a BYP+ port, and the ADJ+ port and the BYP+ port are connected to the positive output end (5) of the power supply.

3. The positive and negative analog power supply structure of a tower ground network analyzer according to claim 1 is characterized in that: The output end of the negative LDO voltage regulator (4) is connected to an ADJ+ port and a BYP+ port, and the ADJ+ port and the BYP+ port are connected to the negative output end (6) of the power supply.

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