Control circuit with function of memorizing polarity of primary induced magnetic field

Abstract

The invention discloses a control circuit with a function of memorizing the polarity of a primary induced magnetic field, which comprises an all-pole-to-south pole monopole control circuit, the input end of the all-pole-to-south pole monopole control circuit is connected with a south pole induction synchronous control circuit, and the output end of the all-pole-to-south pole monopole control circuit is connected with a north pole induction synchronous control circuit. The output end of the north pole induction synchronous control circuit is connected with an all-pole-to-north-pole single-pole control circuit and a judgment circuit, the output end of the south pole induction synchronous control circuit is connected with the judgment circuit, and the input ends of the south pole induction synchronous control circuit and the north pole induction synchronous control circuit are jointly connected with synchronous control logic signals. The input end of the south pole induction synchronous control circuit is connected with a south pole induction signal, and the input end of the north pole induction synchronous control circuit is connected with a north pole induction signal; the problem that in the prior art, when a magnet is assembled, the polarity of the magnet needs to be measured firstly, and packaging efficiency is affected is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of integrated circuits, and in particular relates to a control circuit with a function of memorizing the polarity of an initially induced magnetic field. Background Art

[0002] With the development of science and technology, the continuous innovation of the electronics industry, the functional requirements for chips have become more stringent. As one of the many types of chips, the Hall chip has a wide range of applications. The existing Hall chips on the market are divided into unipolar switch Hall, unipolar linear Hall, bipolar latch switch Hall, bipolar linear Hall, and omnipolar switch Hall. When customers use it in some specific occasions, they can only use unipolar switch Hall or unipolar linear Hall, but the unipolar Hall chip has strict requirements for the assembly of the matching magnet, and the polarity of the magnet must be consistent with the induction polarity of the Hall chip. Therefore, in the production process, it is necessary to add a process to identify the polarity of the magnet, which reduces efficiency, increases production costs, and brings inconvenience. Summary of the invention

[0003] The purpose of the present invention is to provide a control circuit with a function of memorizing the polarity of the first induced magnetic field, thereby solving the problem in the prior art that the polarity of the magnet needs to be measured before assembling the magnet, which affects the packaging efficiency.

[0004] The first technical solution adopted by the present invention is a control circuit with the function of memorizing the polarity of the first induced magnetic field, including an omnipolar to south pole unipolar control circuit, the input end of the omnipolar to south pole unipolar control circuit is connected to the south pole induction synchronization control circuit, the output end of the omnipolar to south pole unipolar control circuit is connected to the north pole induction synchronization control circuit, the output end of the north pole induction synchronization control circuit is respectively connected to the omnipolar to north pole unipolar control circuit and the judgment circuit, the output end of the south pole induction synchronization control circuit is connected to the judgment circuit, the south pole induction synchronization control circuit and the north pole induction synchronization control circuit input end are commonly connected to a synchronization control logic signal, the input end of the south pole induction synchronization control circuit is connected to the south pole induction signal, and the input end of the north pole induction synchronization control circuit is connected to the north pole induction signal.

[0005] The technical solution of the present invention is also characterized in that: The Antarctic sensing synchronous control circuit is a first trigger, which includes a first data input pin D1, a first clock input pin CLK1, a first reset pin RN1 and a first output pin Q1. The first data input pin D1 is connected to the Antarctic sensing signal, the first clock input pin CLK1 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

[0006] The north pole sensing synchronous control circuit is a third trigger, which includes a third data input pin D3, a third clock input pin CLK3, a third reset pin RN3 and a third output pin Q3. The third data input pin D3 is connected to the north pole sensing signal, the third clock input pin CLK3 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

[0007] The omnipolar to south pole unipolar control circuit includes a second trigger, which includes a second data input pin D2, a second clock input pin CLK2, a second reset pin RN2, a second output pin Q2 and a first reverse output terminal QN1. The second data input pin D2 is grounded, the second clock input pin CLK2 is connected to the first output pin Q1, the first output pin Q1 is connected to the first NAND gate input terminal, the first NAND gate is a two-input NAND gate, the second reset pin RN2 is connected to the first NOR gate output terminal, the first NOR gate is a two-input NOR gate, one of the input terminals of the first NOR gate is connected to the output terminal of the first inverter, the input terminal of the first inverter is connected to the power-on reset signal, and the output terminal of the first NAND gate is connected to the input terminal of the third inverter.

[0008] The omnipolar-to-north pole unipolar control circuit includes a fourth trigger, which includes a fourth data input pin D4, a fourth clock input pin CLK4, a fourth reset pin RN4, a fourth output pin Q4 and a second reverse output terminal QN2. The input terminal of the fourth reset pin RN4 is connected to the output terminal of the second NOR gate. The second NOR gate is a two-input NOR gate. One of the input terminals of the second NOR gate is connected to the output terminal of the second inverter. The input terminal of the second inverter is connected to the power-on reset signal. The other input terminal of the second NOR gate is connected to the second output pin Q2. The fourth clock input pin CLK4 is connected to the third output pin Q3. The third output pin Q3 is connected to the second NAND gate input terminal. The second NAND gate is a two-input NAND gate. The other input terminal of the second NAND gate is connected to the first reverse output terminal QN1. The second NAND gate output terminal is connected to the fourth inverter input terminal. The fourth data input pin D4 is grounded. The second reverse output terminal QN2 is connected to the first NAND gate input terminal.

[0009] The judgment circuit is a two-input OR gate.

[0010] The input terminals of the two-input OR gate are respectively connected to the output terminal of the third inverter and the output terminal of the fourth inverter.

[0011] The first flip-flop, the second flip-flop, the third flip-flop and the fourth flip-flop are all D flip-flops.

[0012] The beneficial effect of the present invention is that the south pole induction synchronous control circuit and the north pole induction synchronous control circuit of the present invention receive the induction results of the magnetic field. After power-on, the polarity (south pole or north pole) sensed for the first time will be used as the polarity of subsequent sensing, and the other polarity (north pole or south pole) will not be sensed. This reduces the steps of manually detecting the polarity when assembling the magnet and improves the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a control circuit diagram with the function of memorizing the polarity of the first induced magnetic field; Figure 2 This is a component connection diagram of a control circuit having the function of memorizing the polarity of the first induced magnetic field. DETAILED DESCRIPTION

[0014] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] The control circuit of the present invention has the function of memorizing the polarity of the first induced magnetic field, such as Figure 1 As shown, it includes an omnipolar to south pole unipolar control circuit, the input end of the omnipolar to south pole unipolar control circuit is connected to the south pole induction synchronization control circuit, the output end of the omnipolar to south pole unipolar control circuit is connected to the north pole induction synchronization control circuit, the output end of the north pole induction synchronization control circuit is respectively connected to the omnipolar to north pole unipolar control circuit and the judgment circuit, the output end of the south pole induction synchronization control circuit is connected to the judgment circuit, the south pole induction synchronization control circuit and the input end of the north pole induction synchronization control circuit are commonly connected to a synchronization control logic signal, the input end of the south pole induction synchronization control circuit is connected to a south pole induction signal, and the input end of the north pole induction synchronization control circuit is connected to a north pole induction signal.

[0016] The Antarctic sensing synchronous control circuit is a first trigger, which includes a first data input pin D1, a first clock input pin CLK1, a first reset pin RN1 and a first output pin Q1. The first data input pin D1 is connected to the Antarctic sensing signal, the first clock input pin CLK1 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

[0017] The north pole sensing synchronous control circuit is a third trigger, which includes a third data input pin D3, a third clock input pin CLK3, a third reset pin RN3 and a third output pin Q3. The third data input pin D3 is connected to the north pole sensing signal, the third clock input pin CLK3 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

[0018] The omnipolar to south pole unipolar control circuit includes a second trigger, which includes a second data input pin D2, a second clock input pin CLK2, a second reset pin RN2, a second output pin Q2 and a first reverse output terminal QN1. The second data input pin D2 is grounded, the second clock input pin CLK2 is connected to the first output pin Q1, the first output pin Q1 is connected to the first NAND gate input terminal, the first NAND gate is a two-input NAND gate, the second reset pin RN2 is connected to the first NOR gate output terminal, the first NOR gate is a two-input NOR gate, one of the input terminals of the first NOR gate is connected to the output terminal of the first inverter, the input terminal of the first inverter is connected to the power-on reset signal, and the output terminal of the first NAND gate is connected to the input terminal of the third inverter.

[0019] The omnipolar-to-north pole unipolar control circuit includes a fourth trigger, which includes a fourth data input pin D4, a fourth clock input pin CLK4, a fourth reset pin RN4, a fourth output pin Q4 and a second reverse output terminal QN2. The input terminal of the fourth reset pin RN4 is connected to the output terminal of the second NOR gate. The second NOR gate is a two-input NOR gate. One of the input terminals of the second NOR gate is connected to the output terminal of the second inverter. The input terminal of the second inverter is connected to the power-on reset signal. The other input terminal of the second NOR gate is connected to the second output pin Q2. The fourth clock input pin CLK4 is connected to the third output pin Q3. The third output pin Q3 is connected to the second NAND gate input terminal. The second NAND gate is a two-input NAND gate. The other input terminal of the second NAND gate is connected to the first reverse output terminal QN1. The second NAND gate output terminal is connected to the fourth inverter input terminal. The fourth data input pin D4 is grounded. The second reverse output terminal QN2 is connected to the first NAND gate input terminal. Figure 2 shown.

[0020] The judgment circuit is a two-input OR gate.

[0021] The input terminals of the two-input OR gate are respectively connected to the output terminal of the third inverter and the output terminal of the fourth inverter.

[0022] The first flip-flop, the second flip-flop, the third flip-flop and the fourth flip-flop are all D flip-flops.

[0023] After power-on, the first magnetic field polarity sensed is the sensing signal. If the sensed magnetic field polarity is the south pole, the sensing signal is the south pole sensing signal. If the sensed magnetic field polarity is the north pole, the sensing signal is the north pole sensing signal.

[0024] In a control circuit with the function of memorizing the polarity of the first induced magnetic field, when the circuit is powered on, when the circuit first senses the North Pole induction signal, it works when the North Pole is close, and does not work when it is far away. When the South Pole is close, it does not work.

[0025] After power failure, re-energize the circuit. When the circuit senses the South Pole sensing signal first, it works when the South Pole is close and does not work when it is far away. When the North Pole is close, it does not work.

[0026] Each time the power is turned off and then on again, the induction signal of the first magnetic field polarity sensed will be collected again, and work will be performed after judgment.

[0027] SI represents the North Pole sensing signal, NI represents the South Pole sensing signal, SYN_CTRL represents the synchronous control logic signal. If the North Pole sensing signal is sensed, the logic of the North Pole sensing signal is "1", and if the South Pole sensing signal is sensed, the logic of the South Pole sensing signal is "1". When the rising edge or falling edge of SYN_CTRL arrives, the output logic of the South Pole sensing synchronous control circuit is the same as the logic of the South Pole sensing signal, and the output logic of the North Pole sensing synchronous control circuit is the same as the logic of the South Pole sensing signal; the output logic of the North Pole sensing synchronous control circuit is logically "OR" operated with the output logic of the South Pole sensing synchronous control circuit to obtain the final output result.

[0028] After the circuit is powered on, if the rising edge or falling edge of SYN_CTRL arrives, SI first changes from logic "0" to logic "1", and NI remains at logic "0", then the logic of the omnipolar to south pole unipolar control circuit sensing the south pole sensing signal is "1", the input logic of the omnipolar to north pole unipolar control circuit is "0", and the output logic of the omnipolar to south pole unipolar control circuit is "1", making the output logic of the north pole sensing synchronous logic control circuit "0". The final output result of the circuit is only determined by the logic of the south pole sensing signal and has nothing to do with the north pole sensing signal. For the control circuit with the function of memorizing the polarity of the first induced magnetic field, its output form changes from the omnipolar magnetic field magnetism at power-on to a unipolar that can only sense the south pole.

[0029] After the circuit is powered on, if the rising or falling edge of SYN_CTRL arrives, NI first changes from logic "0" to logic "1", and SI remains at logic "0", then the input logic of the omnipolar to north pole unipolar control circuit is "1", and the logic of the omnipolar to south pole unipolar control circuit sensing the south pole sensing signal is "0", and the output logic of the omnipolar to north pole unipolar control circuit is "1", making the output logic of the south pole sensing synchronous logic control circuit "0". The final output result of the circuit is only determined by the logic of the north pole sensing signal and has nothing to do with the south pole sensing signal. For the control circuit with the function of memorizing the polarity of the first induced magnetic field, its output form changes from the omnipolar magnetic field magnetism at power-on to a unipolar that can only sense the north pole.

[0030] If a control circuit with the function of memorizing the polarity of the first induced magnetic field first senses a South Pole signal after power-on, it will work when the South Pole is close to the circuit, do not work when the South Pole is far away from the circuit, and do not work when the North Pole is close to the circuit; if a control circuit with the function of memorizing the polarity of the first induced magnetic field first senses a North Pole signal after power-on, it will work when the North Pole is close to the circuit, do not work when the North Pole is far away from the circuit, and do not work when the South Pole is close to the circuit.

[0031] Example 1 The control circuit with the function of memorizing the polarity of the first induced magnetic field of the present invention comprises an omnipolar-to-south pole unipolar control circuit, the input end of the omnipolar-to-south pole unipolar control circuit is connected to the south pole induction synchronous control circuit, the output end of the omnipolar-to-south pole unipolar control circuit is connected to the north pole induction synchronous control circuit, the output end of the north pole induction synchronous control circuit is respectively connected to the omnipolar-to-north pole unipolar control circuit and the judgment circuit, the output end of the south pole induction synchronous control circuit is connected to the judgment circuit, the south pole induction synchronous control circuit and the input end of the north pole induction synchronous control circuit are commonly connected to a synchronous control logic signal, the input end of the south pole induction synchronous control circuit is connected to the south pole induction signal, and the input end of the north pole induction synchronous control circuit is connected to the north pole induction signal.

[0032] Example 2 The control circuit with the function of memorizing the polarity of the first induced magnetic field of the present invention comprises an omnipolar-to-south pole unipolar control circuit, the input end of the omnipolar-to-south pole unipolar control circuit is connected to the south pole induction synchronous control circuit, the output end of the omnipolar-to-south pole unipolar control circuit is connected to the north pole induction synchronous control circuit, the output end of the north pole induction synchronous control circuit is respectively connected to the omnipolar-to-north pole unipolar control circuit and the judgment circuit, the output end of the south pole induction synchronous control circuit is connected to the judgment circuit, the south pole induction synchronous control circuit and the input end of the north pole induction synchronous control circuit are commonly connected to a synchronous control logic signal, the input end of the south pole induction synchronous control circuit is connected to the south pole induction signal, and the input end of the north pole induction synchronous control circuit is connected to the north pole induction signal.

[0033] The Antarctic sensing synchronous control circuit is a first trigger, which includes a first data input pin D1, a first clock input pin CLK1, a first reset pin RN1 and a first output pin Q1. The first data input pin D1 is connected to the Antarctic sensing signal, the first clock input pin CLK1 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

[0034] Example 3 The control circuit with the function of memorizing the polarity of the first induced magnetic field of the present invention comprises an omnipolar-to-south pole unipolar control circuit, the input end of the omnipolar-to-south pole unipolar control circuit is connected to the south pole induction synchronous control circuit, the output end of the omnipolar-to-south pole unipolar control circuit is connected to the north pole induction synchronous control circuit, the output end of the north pole induction synchronous control circuit is respectively connected to the omnipolar-to-north pole unipolar control circuit and the judgment circuit, the output end of the south pole induction synchronous control circuit is connected to the judgment circuit, the south pole induction synchronous control circuit and the input end of the north pole induction synchronous control circuit are commonly connected to a synchronous control logic signal, the input end of the south pole induction synchronous control circuit is connected to the south pole induction signal, and the input end of the north pole induction synchronous control circuit is connected to the north pole induction signal.

[0035] The Antarctic sensing synchronous control circuit is a first trigger, which includes a first data input pin D1, a first clock input pin CLK1, a first reset pin RN1 and a first output pin Q1. The first data input pin D1 is connected to the Antarctic sensing signal, the first clock input pin CLK1 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

[0036] The north pole sensing synchronous control circuit is a third trigger, which includes a third data input pin D3, a third clock input pin CLK3, a third reset pin RN3 and a third output pin Q3. The third data input pin D3 is connected to the north pole sensing signal, the third clock input pin CLK3 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

[0037] Example 4 The control circuit with the function of memorizing the polarity of the first induced magnetic field of the present invention comprises an omnipolar-to-south pole unipolar control circuit, the input end of the omnipolar-to-south pole unipolar control circuit is connected to the south pole induction synchronous control circuit, the output end of the omnipolar-to-south pole unipolar control circuit is connected to the north pole induction synchronous control circuit, the output end of the north pole induction synchronous control circuit is respectively connected to the omnipolar-to-north pole unipolar control circuit and the judgment circuit, the output end of the south pole induction synchronous control circuit is connected to the judgment circuit, the south pole induction synchronous control circuit and the input end of the north pole induction synchronous control circuit are commonly connected to a synchronous control logic signal, the input end of the south pole induction synchronous control circuit is connected to the south pole induction signal, and the input end of the north pole induction synchronous control circuit is connected to the north pole induction signal.

[0038] The Antarctic sensing synchronous control circuit is a first trigger, which includes a first data input pin D1, a first clock input pin CLK1, a first reset pin RN1 and a first output pin Q1. The first data input pin D1 is connected to the Antarctic sensing signal, the first clock input pin CLK1 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

[0039] The north pole sensing synchronous control circuit is a third trigger, which includes a third data input pin D3, a third clock input pin CLK3, a third reset pin RN3 and a third output pin Q3. The third data input pin D3 is connected to the north pole sensing signal, the third clock input pin CLK3 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

[0040] The omnipolar to south pole unipolar control circuit includes a second trigger, which includes a second data input pin D2, a second clock input pin CLK2, a second reset pin RN2, a second output pin Q2 and a first reverse output terminal QN1. The second data input pin D2 is grounded, the second clock input pin CLK2 is connected to the first output pin Q1, the first output pin Q1 is connected to the first NAND gate input terminal, the first NAND gate is a two-input NAND gate, the second reset pin RN2 is connected to the first NOR gate output terminal, the first NOR gate is a two-input NOR gate, one of the input terminals of the first NOR gate is connected to the output terminal of the first inverter, the input terminal of the first inverter is connected to the power-on reset signal, and the output terminal of the first NAND gate is connected to the input terminal of the third inverter.

[0041] Example 5 The control circuit with the function of memorizing the polarity of the first induced magnetic field of the present invention comprises an omnipolar-to-south pole unipolar control circuit, the input end of the omnipolar-to-south pole unipolar control circuit is connected to the south pole induction synchronous control circuit, the output end of the omnipolar-to-south pole unipolar control circuit is connected to the north pole induction synchronous control circuit, the output end of the north pole induction synchronous control circuit is respectively connected to the omnipolar-to-north pole unipolar control circuit and the judgment circuit, the output end of the south pole induction synchronous control circuit is connected to the judgment circuit, the south pole induction synchronous control circuit and the input end of the north pole induction synchronous control circuit are commonly connected to a synchronous control logic signal, the input end of the south pole induction synchronous control circuit is connected to the south pole induction signal, and the input end of the north pole induction synchronous control circuit is connected to the north pole induction signal.

[0042] The Antarctic sensing synchronous control circuit is a first trigger, which includes a first data input pin D1, a first clock input pin CLK1, a first reset pin RN1 and a first output pin Q1. The first data input pin D1 is connected to the Antarctic sensing signal, the first clock input pin CLK1 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

[0043] The north pole sensing synchronous control circuit is a third trigger, which includes a third data input pin D3, a third clock input pin CLK3, a third reset pin RN3 and a third output pin Q3. The third data input pin D3 is connected to the north pole sensing signal, the third clock input pin CLK3 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

[0044] The omnipolar to south pole unipolar control circuit includes a second trigger, which includes a second data input pin D2, a second clock input pin CLK2, a second reset pin RN2, a second output pin Q2 and a first reverse output terminal QN1. The second data input pin D2 is grounded, the second clock input pin CLK2 is connected to the first output pin Q1, the first output pin Q1 is connected to the first NAND gate input terminal, the first NAND gate is a two-input NAND gate, the second reset pin RN2 is connected to the first NOR gate output terminal, the first NOR gate is a two-input NOR gate, one of the input terminals of the first NOR gate is connected to the output terminal of the first inverter, the input terminal of the first inverter is connected to the power-on reset signal, and the output terminal of the first NAND gate is connected to the input terminal of the third inverter.

[0045] The omnipolar-to-north pole unipolar control circuit includes a fourth trigger, which includes a fourth data input pin D4, a fourth clock input pin CLK4, a fourth reset pin RN4, a fourth output pin Q4 and a second reverse output terminal QN2. The input terminal of the fourth reset pin RN4 is connected to the output terminal of the second NOR gate. The second NOR gate is a two-input NOR gate. One of the input terminals of the second NOR gate is connected to the output terminal of the second inverter. The input terminal of the second inverter is connected to the power-on reset signal. The other input terminal of the second NOR gate is connected to the second output pin Q2. The fourth clock input pin CLK4 is connected to the third output pin Q3. The third output pin Q3 is connected to the second NAND gate input terminal. The second NAND gate is a two-input NAND gate. The other input terminal of the second NAND gate is connected to the first reverse output terminal QN1. The second NAND gate output terminal is connected to the fourth inverter input terminal. The fourth data input pin D4 is grounded. The second reverse output terminal QN2 is connected to the first NAND gate input terminal.

[0046] Example 6 The control circuit with the function of memorizing the polarity of the first induced magnetic field of the present invention comprises an omnipolar-to-south pole unipolar control circuit, the input end of the omnipolar-to-south pole unipolar control circuit is connected to the south pole induction synchronous control circuit, the output end of the omnipolar-to-south pole unipolar control circuit is connected to the north pole induction synchronous control circuit, the output end of the north pole induction synchronous control circuit is respectively connected to the omnipolar-to-north pole unipolar control circuit and the judgment circuit, the output end of the south pole induction synchronous control circuit is connected to the judgment circuit, the south pole induction synchronous control circuit and the input end of the north pole induction synchronous control circuit are commonly connected to a synchronous control logic signal, the input end of the south pole induction synchronous control circuit is connected to the south pole induction signal, and the input end of the north pole induction synchronous control circuit is connected to the north pole induction signal.

[0047] The Antarctic sensing synchronous control circuit is a first trigger, which includes a first data input pin D1, a first clock input pin CLK1, a first reset pin RN1 and a first output pin Q1. The first data input pin D1 is connected to the Antarctic sensing signal, the first clock input pin CLK1 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

[0048] The north pole sensing synchronous control circuit is a third trigger, which includes a third data input pin D3, a third clock input pin CLK3, a third reset pin RN3 and a third output pin Q3. The third data input pin D3 is connected to the north pole sensing signal, the third clock input pin CLK3 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

[0049] The omnipolar to south pole unipolar control circuit includes a second trigger, which includes a second data input pin D2, a second clock input pin CLK2, a second reset pin RN2, a second output pin Q2 and a first reverse output terminal QN1. The second data input pin D2 is grounded, the second clock input pin CLK2 is connected to the first output pin Q1, the first output pin Q1 is connected to the first NAND gate input terminal, the first NAND gate is a two-input NAND gate, the second reset pin RN2 is connected to the first NOR gate output terminal, the first NOR gate is a two-input NOR gate, one of the input terminals of the first NOR gate is connected to the output terminal of the first inverter, the input terminal of the first inverter is connected to the power-on reset signal, and the output terminal of the first NAND gate is connected to the input terminal of the third inverter.

[0050] The omnipolar-to-north pole unipolar control circuit includes a fourth trigger, which includes a fourth data input pin D4, a fourth clock input pin CLK4, a fourth reset pin RN4, a fourth output pin Q4 and a second reverse output terminal QN2. The input terminal of the fourth reset pin RN4 is connected to the output terminal of the second NOR gate. The second NOR gate is a two-input NOR gate. One of the input terminals of the second NOR gate is connected to the output terminal of the second inverter. The input terminal of the second inverter is connected to the power-on reset signal. The other input terminal of the second NOR gate is connected to the second output pin Q2. The fourth clock input pin CLK4 is connected to the third output pin Q3. The third output pin Q3 is connected to the second NAND gate input terminal. The second NAND gate is a two-input NAND gate. The other input terminal of the second NAND gate is connected to the first reverse output terminal QN1. The second NAND gate output terminal is connected to the fourth inverter input terminal. The fourth data input pin D4 is grounded. The second reverse output terminal QN2 is connected to the first NAND gate input terminal.

[0051] The judgment circuit is a two-input OR gate, and the input terminals of the two-input OR gate are respectively connected to the output terminal of the third inverter and the output terminal of the fourth inverter.

[0052] The first flip-flop, the second flip-flop, the third flip-flop and the fourth flip-flop are all D flip-flops.

Claims

1. A control circuit having a function of memorizing the polarity of the first induced magnetic field, characterized in that: The invention comprises an omnipolar-to-south pole unipolar control circuit, wherein the input end of the omnipolar-to-south pole unipolar control circuit is connected to a south pole induction synchronous control circuit, the output end of the omnipolar-to-south pole unipolar control circuit is connected to a north pole induction synchronous control circuit, the output end of the north pole induction synchronous control circuit is respectively connected to an omnipolar-to-north pole unipolar control circuit and a judgment circuit, the output end of the south pole induction synchronous control circuit is connected to the judgment circuit, the south pole induction synchronous control circuit and the input end of the north pole induction synchronous control circuit are commonly connected to a synchronous control logic signal, the input end of the south pole induction synchronous control circuit is connected to a south pole induction signal, and the input end of the north pole induction synchronous control circuit is connected to a north pole induction signal.

2. The control circuit having the function of memorizing the polarity of the first induced magnetic field according to claim 1, characterized in that: The Antarctic sensing synchronous control circuit is a first trigger, which includes a first data input pin D1, a first clock input pin CLK1, a first reset pin RN1 and a first output pin Q1. The first data input pin D1 is connected to the Antarctic sensing signal, the first clock input pin CLK1 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

3. The control circuit having the function of memorizing the polarity of the first induced magnetic field according to claim 2, characterized in that: The north pole sensing synchronous control circuit is a third trigger, and the third trigger includes a third data input pin D3, a third clock input pin CLK3, a third reset pin RN3 and a third output pin Q3. The third data input pin D3 is connected to the north pole sensing signal, the third clock input pin CLK3 is connected to the synchronous control logic signal, and the first reset pin RN1 is connected to the power-on reset signal.

4. The control circuit having the function of memorizing the polarity of the first induced magnetic field according to claim 3, characterized in that: The omnipolar to south pole unipolar control circuit includes a second trigger, which includes a second data input pin D2, a second clock input pin CLK2, a second reset pin RN2, a second output pin Q2 and a first reverse output terminal QN1. The second data input pin D2 is grounded, the second clock input pin CLK2 is connected to the first output pin Q1, the first output pin Q1 is connected to the first NAND gate input terminal, the first NAND gate is a two-input NAND gate, the second reset pin RN2 is connected to the first NOR gate output terminal, the first NOR gate is a two-input NOR gate, one of the input terminals of the first NOR gate is connected to the output terminal of the first inverter, the input terminal of the first inverter is connected to the power-on reset signal, and the output terminal of the first NAND gate is connected to the input terminal of the third inverter.

5. The control circuit having the function of memorizing the polarity of the first induced magnetic field according to claim 4, characterized in that: The omnipolar-to-north pole unipolar control circuit includes a fourth trigger, which includes a fourth data input pin D4, a fourth clock input pin CLK4, a fourth reset pin RN4, a fourth output pin Q4 and a second reverse output terminal QN2. The input terminal of the fourth reset pin RN4 is connected to the output terminal of the second NOR gate. The second NOR gate is a two-input NOR gate. One of the input terminals of the second NOR gate is connected to the output terminal of the second inverter. The input terminal of the second inverter is connected to the power-on reset signal. The other input terminal of the second NOR gate is connected to the second output pin Q2. The fourth clock input pin CLK4 is connected to the third output pin Q3. The third output pin Q3 is connected to the second NAND gate input terminal. The second NAND gate is a two-input NAND gate. The other input terminal of the second NAND gate is connected to the first reverse output terminal QN1. The output terminal of the second NAND gate is connected to the fourth inverter input terminal. The fourth data input pin D4 is grounded. The second reverse output terminal QN2 is connected to the first NAND gate input terminal.

6. The control circuit having the function of memorizing the polarity of the first induced magnetic field according to claim 5, characterized in that: The judgment circuit is a two-input OR gate.

7. The control circuit having the function of memorizing the polarity of the first induced magnetic field according to claim 6, characterized in that: The two-input OR gate input terminals are connected to the third inverter output terminal and the fourth inverter output terminal respectively.

8. The control circuit having the function of memorizing the polarity of the first induced magnetic field according to claim 6 or 7, characterized in that: The first trigger, the second trigger, the third trigger and the fourth trigger are all D triggers.

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