TWM255588U - Control circuit of single-chip for protecting from surges - Google Patents

Description

M255588 V. Creation Instructions (1) [Technical field to which this creation belongs] This creation is about a kind of drive circuit, especially for a bipolar motor drive circuit with low switching speed. [Prior art] General motors, such as stepper motors and Hall (Ha 1 1) motors, require a control circuit that controls rotation, stopping, and position for the motor to run. At the same time, a wheel-out driver is required to make the exciting current flow. There are various control methods and excitation methods for driving the coil. Bipolar driving is one of many methods that are also widely used. Figure 7 shows the structure of the bipolar driver. It uses a single positive power supply, 4 NPN transistors and a motor coil. The base inputs of the transistors are divided into Eil, Ei2, Ei3, and Ei4. Through these four inputs, Q1 and Q4 can be turned on, Q 2 and Q 3 can be turned off, and the current can be passed from the positive power source through the transistor q 4, node n 2, the motor coil, node Π, and transistor Q1 to the negative power source; or the reverse situation: Q 2 and Q 3 are turned on, Q1 and Q 4 are not turned on, and the current is passed from the positive power source through the transistor Q3 'node N1, the motor coil, the node N2, and the transistor Q2 to the negative power source. , *, The above-mentioned conventional bipolar motor driver circuit, or a similar circuit, is far from two difficult points: the motor coil is an inductive negative, according to electricity M255588 5. Creation instructions (2) magnetic principle, this There will be a back-EMF in the inductor, its size ^ V = L * di / dt, where △ V ·· is the rate of change of the voltage change time. This voltage change will damage the connection to it and Q3, Q2 and Q4. Opened at the same time, causing overheating or other traditional solutions can be used in the capacitor voltage regulator diode and control on the 0 force port to protect the component although the problem 9 such as electromagnetic interference reliability sequence control also causes difficulties in use; L is the inductance value, and di / dt is the currentization reaction at nodes N1 and N2, Q1, Q2, Q3, and Q4; (2), otherwise there will be a large DC current reliability problem. Protection components are added to N1 and N2, and the input timings ensure that large DC currents are not two major difficulties, but they also cause other weak or bulky components. In addition, if Q1 is in question, make the content] drive the above-mentioned prior technology, add protection components to cause problems such as electromagnetic dry edges, weak reliance, and volume, and timing control also makes use of difficult. Therefore, this creation provides a bipolar motor% circuit with low switching speed to avoid the above situation. M255588 V. Creation Instructions (3)-One purpose of this creation is to provide a motor driver circuit that reduces back-EMF. Another purpose of this creation is to provide a motor driver appliance that does not require special timing control. The above purpose can be accomplished by a bipolar motor driver circuit with a low switching speed. The main point is to convert the input timing signal pair that controls the motor switch into another control timing signal pair. The timing signal pair satisfies ... (1 Low switching speed 'has a delay time of microsecond order (2) Non-overlapping with each other, and the transistors controlled by the two timing signals will not be turned on at the same time. Because the system operation time of the motor is 1 second, the low-speed timing signal with the microsecond order does not affect the system operation speed of the motor. Precisely reduce the control tail; report pq pq > ^ Reduce the switching speed of the sequence signal by 6 times and hope to reach the exhaustion sequence signal, the generation of the road current, the two points above the two ▲ sundial circuit has a high Stability and reliability. ^ The driver of the driver according to the above-mentioned driver circuit, including the absorption of current, the first purpose of this' provided: a first transistor and a transistor and the second transistor a bipolar motor first transistor, To form a common emitter in parallel

• Page 9 M255588 V. Creative Instructions (4) The first number and a second timing wheel, the base of the body ^ do n’t accept a first timing input body, which is connected to Daring I ' The transistor is connected to a fourth transistor collector. The fourth transistor is used to drive a current to the second transistor and the first transistor is connected to the first transistor. Collector; one to five currents to the first transistor = body, which is connected into a Darlington structure to drive the transistor collector, complex:-the collector 'the sixth transistor emitter is connected to the second and Connected-the first electricity; the third crystal; the common emitter with the fifth transistor and a first anode, the second transistor base in series with a first two crystal base in series with a stem-connected to the The first transistor collector, the fifth transistor collector, and the first and the first resistor are connected to the first ground to absorb the crystal and an eighth transistor, and the emitters thereof are respectively The eighth transistor and the tenth transistor are used to connect to the tenth transistor M, with: connected to :: ,, the base;-the ninth transistor crystal emitter is connected to ;: the connection point of the pole, The connection between the tenth and eighth electric aa body and the second transistor common base ^ In the second, the ninth transistor and the tenth transistor form a common collector and are connected to an external voltage; an eleventh The crystal and a twelfth transistor are connected to the Darlington structure. The eleventh transistor base accepts the first timing input. The eleventh transistor collector and the twelfth transistor The bases are connected and grounded via a first capacitor, the twelfth transistor emitter is connected to the ninth transistor base via a third resistor; and a thirteenth transistor is connected to a fourteenth transistor A crystal connected to a Darlington structure, the thirteenth transistor base receives the second timing input signal, the thirteenth transistor collector and

Page 10 M255588 V. Creative Instructions (5) The tenth transistor base is connected and grounded via a second capacitor. The fourteen transistor emitter is connected to the tenth tenth via the fourth resistor. The transistor and the thirteenth transistor are connected to the second external voltage. The first phase is parallel to the first resistance. The tenth and tenth resistors are connected at one end. The connection is based on the above-mentioned five resistors, which are located between the first connection, the fourth end, the one end, the resistance, and the first voltage. 'Among them, the bipolar motor driver circuit is more enclosed between the base of the first transistor and the emitter; between the base of the transistor and the emitter at a corner; a seventh transistor P', and the other end Ground; an eighth zero sixth transistor base, and the other end grounded; one lifetime the ninth transistor base, and the other end grounded; one connected to the tenth transistor base, and the other end grounded at The ninth transistor collector and the second external electrical resistor are located outside the tenth transistor collector and the second sixty-ninth. According to the above concept, the seventh to the fourteenth thunderstorms The solar body collector sends a chip-signal to the Πΐ 二 Γϊ eight transistor collector. Note: At the time, 'the seventh transistor's set i remains n-transistor': the body and the fourth transistor cannot be connected, Use]: Bit 'causes the fourth transistor to be turned on at the same time. The first transistor stops the collector of the eighth transistor, and the collector of the eight transistor is kept low: full, closed, and the sixth transistor cannot be turned on. Use: The first transistor stops the second transistor and the Letter No. and M255588 V. Creative Instructions (6) The transistor is turned on at the same time. According to the above concept, the seventh transistor collector sends a second signal to the fourteenth transistor emitter, and the first transistor The eight transistor collector sends a first signal to the twelfth transistor emitter. When the first transistor is not completely turned off, the collector of the seventh transistor is kept at a low potential, causing the second transistor. It cannot be connected to the fourth transistor to prevent the first transistor and the fourth transistor from conducting at the same time. When the second transistor is not completely turned off, the collector of the eighth transistor is kept at a low potential. The first transistor and the sixth transistor cannot be connected to prevent the second transistor and the sixth transistor from being turned on at the same time. According to the above concept, the seventh transistor collector sends a second signal to The tenth transistor base, and the eighth transistor set Send a first signal to the ninth transistor base, and when the first transistor is not completely turned off, the collector of the seventh transistor remains at a low potential, causing the second transistor and the fourth transistor Cannot be turned on to prevent the first transistor and the fourth transistor from being turned on simultaneously. When the second transistor is not completely turned off, the collector of the eighth transistor is kept at a low potential, causing the first transistor The sixth transistor cannot be connected with the sixth transistor to prevent the second transistor and the sixth transistor from conducting at the same time. According to the above-mentioned purpose, the present invention provides a bipolar motor driver circuit, including a first Transistor and a second transistor for

Page 12 M255588 V. Creation instructions (7) Absorb current, defame the first transistor and the second place 'The brother I, Su ^ ~ The transistor is a common emitter and interface ♦ 溆 筮-pull the transistor base The poles are very widely recognized by a group of people and a first input sequence, one after another, and the first input sequence, which is connected to form a Darlington ^ ^, two transistors and a fourth battery. Crystal collector: the fourth transistor: pole connection: c to: the second transistor and a sixth transistor, J: connected to the transistor collector, the fifth current to the first transistor The upper eight presses form a Darlington structure for driving transistor collector 1; the f six-transistor emitter is connected to the second and connected -th-external voltage and the fifth transistor common-emitter body and brother-resistor And connected to the second day: Press: a crystal base in series-the second electric body collector, the fifth electric transistor collector; a seventh transistor = disk one = two resistors connected to the first A ground is used to absorb current, the second: two] crystals whose emitters are respectively connected to the seventh by a third resistor; m electricity: the body emitter shows seven tails via L _ ^ t The connection point of the common base of the solar body and the first transistor. The emitter of the tenth transistor is connected to the connection point of the common base of the eighth transistor and the second transistor via a fourth resistor. The ninth transistor and the tenth transistor have a common collector and are connected to a second external voltage; an eleventh transistor is connected to the ninth transistor to form a Darlington structure, and the eleventh transistor has a base receiving The first timing input signal, the __ transistor collector is connected to the ninth transistor base and grounded via a first capacitor; and a thirteenth transistor 'is connected to the tenth transistor Into a Darlington structure, the thirteenth transistor base receives the second timing input signal, the thirteenth

Page 13 M255588 5. Creation instructions (8) The transistor collector is connected to the tenth transistor base and grounded via a second capacitor. According to the above concept, the bipolar motor driver circuit further includes: a fifth resistor between the base and the emitter of the first transistor; a sixth resistor between the base and the emitter of the second transistor A seventh resistor having one end connected to the fourth transistor base and the other end to ground; and an eighth resistor having one end connected to the sixth transistor base and the other end to ground.

According to the above concept, wherein the seventh transistor collector sends a second signal to the tenth transistor base, and the eighth transistor collector sends a first signal to the ninth transistor base, when the When the first transistor is not completely turned off, the collector of the seventh transistor is kept at a low potential, so that the second transistor and the fourth transistor cannot be conducted to prevent the first transistor and the fourth transistor from conducting. The crystals are turned on at the same time. When the second transistor is not completely turned off, the collector of the eighth transistor is kept at a low potential, causing the first transistor and the sixth transistor to fail to conduct to prevent the second transistor. The crystal is turned on simultaneously with the sixth transistor.

According to the above concept, wherein the seventh transistor collector sends a second signal to the tenth transistor emitter, and the eighth transistor collector sends a first signal to the ninth transistor emitter, when the When the first transistor is not completely turned off, the collector of the seventh transistor is kept at a low potential, so that the second transistor and the fourth transistor cannot be conducted, so as to prevent the first transistor from connecting to the fourth transistor.

Page 14 M255588 V. Creation instructions (9) The fourth transistor is turned on at the same time, and the collector of t ”transistor is kept at a low potential, causing the second transistor to be turned on at the same time. In order to prevent the brother-electric body and the first transistor Liudian [Implementation] Some examples of this creation will be described in detail below. However, in addition to the detailed description, the second creation can also be widely implemented in other embodiments, and the scope of this creation is not limited. The range shall prevail. The first of the bipolar motor driver circuit in this creation is shown in the figure: A ~ 1C, which can be divided into two parts, A and B. The first part of Jiadian Road is not included in the examples: part, including : * Is the NPN electrode D1 for the absorption of current 1 1 1 12 1 as the drive current to Ω 9 PN transistor Q3 and PN transistor Q4 are connected to form a Darlington structure, and to drive t current to Q1 PNP transistor buckle and NpN transistor crystal structure, _ common emitter is connected to an external voltage vcc, connected to :: connect: = pole, the emitter of Q6 is connected to the collector of Q2, and the base of Q3 is then connected in series A diode D1 and a resistor R1 are connected to the collector of ⑽, ^ 1 f is connected to a diode D2 And the resistor R2 is connected between the collectors of "= Q2". The idle path motor is connected to Q1 and

Page 15 M255588 V. Creative Instructions (10) The second part of the circuit contains: the emitters of the transistors used to absorb the current are grounded, the base of Q7 is connected to the base of Q1, and the base of _ ϋ / lQ2 The collectors of the NPN transistors Q9 and 07 disks used to provide current are connected to the external voltage VDD, and the emitter of Q9 is connected to the connection point of the bases of Q1 to provide the base voltage of Qm Qi. , ^, The emitter of Q10 is connected to the connection point of the bases of q_Q2 to provide the base current of Q8 and Q2; the PNP transistor Q1 丨 and the NpN transistor qi are connected to form a Darlington structure, and the PNP transistor Q13 and NpN transistor Qu are connected to form a Lington structure, and the bases of Q11 and Q13 respectively receive input timing signals ΕΗ-, β i 2 Q11 and Q13 are connected to a common emitter and externally connected to an external electrical switch vdd, Q 1 1 The common point of the collector and the base of Q 1 2 is grounded via the capacitor c 丨, the common point of the collector of QJ 3 and the base of Q14 is grounded via the capacitor 02, and the emitter of Q12 is connected to the NPN via the resistor R3 Base of transistor Q9. The emitter of Q14 is connected to the base of NPN transistor Qi0 via resistor R4. By connecting the collector signal Q7 of Q7 to the base of qi 4 and the collector signal 0X1 of Q8 to the base of Q1 2 (Figure 1a); or 0X2 to the emitter of Q1 4 Pole and connect 0X1 to the emitter of Q12 (Figure ιβ); or connect 0 × 2 to the base of qi〇 'and connect 0X1 to the base of Q9 (Figure lc), so that (·) When Q1 is not completely turned off, the collector potential of Q7, χ2, remains low (by appropriate selection of the applied voltage VDD and the resistance value R3, Q7 can be controlled to operate in the saturation region), causing Q2 and Q4 to fail to conduct; 2) When Q2 is not completely turned off, Q8's collector potential 0X 1 remains low (again, Pipi is controlled to operate in the saturation region)

Page 16 M255588 V. Creation Instructions (11) Make… and Q6 can not be connected, therefore, by the feedback of signals 0X2 and 0X1, you can ensure the short-circuit path, that is, Q6, Q2 are turned on at the same time, or Q4, are turned on at the same time. The situation does not occur. As for the M part, it can be seen through QU, Q12, capacitor c, and resistor 1 ^ 3, and Q13, Q14, capacitor C2, and resistor at the base end of r:! = RmQi4. The effective resistance is 10,000 times the resistance of the m-pole, respectively. Therefore, the time constant (, value) is amplified by the cold seven 'to achieve the purpose of reducing the switching speed. The variation of the foregoing first preferred embodiment is shown in Fig. 2a ~ 2. Some additional resistors are added as follows: a resistor is connected in series between the base of qi and the emitter of Γ, and the base of Q4 is connected in series. , Γ ΐ two poles, and Q1 ° bases are connected in series-resistance and connected to voltage VDD. By adding this 虺 resistance,: f to 卜 to get some parameters ❶ 电 电】] It is easier to adjust a second comparative embodiment of the creation on the circuit shown in Figures 3A and 3B. According to the table test,-part is completely the same, surrounded by the IL line) and the second part of Fig. 1a and Fig. 3A. Compared with the second part of Fig. U, the differences Q12 and Q14 no longer exist. Details ^ 'Ding Zuo bang and a, in Figure 1 A, the left Q j!, Q】 2

Page 17 M255588 V. Creation Note (12) The Darlington structure formed is replaced by a single pNp transistor Q1 丨, and the resistor R3 is also moved to the emitter of Q9. The situation on the right is similar, and its explanation is omitted. Class = In Figure 1, there are also two connection methods for the feedback signals 0X2 and 0X1, which are explained as follows: By connecting the collector signal 0X2 of Q7 to the base of Q10, and connecting the collector signal 0X1 of Q8 to the base of q9 (See Figure 3A), or connect 0x2 to the emitter of Q1〇 'and 0X1 to the emitter of Q9 (see Figure 3B), which can also ensure that a short-circuit path does not occur. Similarly, the path formed by QU, Q9, capacitor C1, and resistor R3, and the part formed by QU, Q10, capacitor C2, and resistor R4 are ^ & μ f in Q9 or Q1. The equivalent resistance seen at the base terminal is to reduce the switching speed. Therefore, the time constant is enlarged by ^ times to make it easier to snow. By adding some resistors to the aforementioned second preferred embodiment, it is easier to adjust the circuit resistance. In this inflammation 4B, the _base ^ pole ^ this change is shown in the figure for grounding. 4 bases of Q6 are respectively connected with a resistor in series and refer to FIG. 5, and FIG. 5A is used as a subtraction added to the conventional technique (FIG. 7) and the timing sequence # E i 1 and E i 2 are divided into The output currents are shown in the circuit shown in Figure 2A as an example, Figure 5B and Figure 5C. In Figure 5A, the horizontal

Page 18 M255588 V. Creation instructions (13) The axis is marked between 2 0 and 2 10 for a period of time. Eu and this time appear as high as i on the circuit of the conventional technology (Figure 5B):, = damage product Body circuit. And on the circuit of this creation (Figure 50, 2 of the soil: held in the range of about 5 ~ 371mA, it proves that this creation can suppress large currents-

Figure 6 of McCaw, also uses the input signals e soil 丨 and E 丨 2 shown in FIG. 5A, and adds them to the circuit of the conventional technology (Figure 7) and this creation (taking Figure 2A as an example), the resulting output The voltage (potential difference between the terminals DO and DOB) is no longer than that shown in FIGS. 6A and 6B. Comparing the two pictures, it can be seen that the surge shown in FIG. 6A has a surge exceeding 90 volts, and the largest surge in the original creation shown in FIG. 6B does not exceed 20 volts, which proves the creation Can suppress the generation of large voltages. Figure 5 and Figure 6 can be integrated. It can be seen that compared with the conventional circuit, this creation has a better protection circuit effect. Even though the present invention is described by citing several preferred embodiments, the present invention is not limited to the illustrated embodiments. Although specific examples have been cited and described previously, it is obvious that other equivalent changes or modifications made without departing from the spirit disclosed in this creation should be included in the scope of the patent application for this creation. In addition, all other similar and similar changes or modifications made without departing from the spirit disclosed in this creation are also included in the scope of patent application for this creation. At the same time, the scope of this creation should be interpreted in the broadest definition, so as to include all modifications and similar structures.

The M255588 diagram on page 19 is a simple illustration. Figures 1A ~ 1C show the first preferred embodiment of the bipolar motor driver circuit with low switching speed of this creation; Figures 2A ~ 2C show the first preferred embodiment of the above Variations; Figures 3A and 3B show the second preferred embodiment of the bipolar motor driver circuit with low switching speed of the present invention; Figures 4A and 4B show the modification of the second preferred embodiment;

Fig. 5 shows the current simulation results obtained by comparing this creation with the prior art under the same input signal. Fig. 6 shows the comparison between this creation and the conventional technique under the same input signal. The voltage simulation results obtained respectively; FIG. 7 shows the structure of a conventional bipolar motor driver. Schematic symbol description:

Q '1, Q' 2, Q '3, Q' 4: NPN transistors E 'Η, E' i2, E 'i3, E' i4: respectively Q ': l, Q, 2, Q' 3 Q, 4 base inputs N1, N2: nodes M, M ': motor coil

The M255588 diagram on page 20 is a simple explanation: Q2, Q4, Q6, Q7, Q8, Q9, Q10, Q12, Q14: NPN transistors Q3, Q5, Q1 and Q13: PNP transistors E i 1, E i 2: Timing signals VCC, VDD: external voltages ΪΠ, R2, R3, R4, R5, R6, R7, R8, R9, RIO, RH,

R 1 2: Resistance D 1, D 2: Diode C 1, C 2: Capacitance 0X, 0X2: Collector signal DO, D0B: Terminal

Page 21

Claims (1)

M255588 6. Scope of patent application 1 _ A bipolar motor driver circuit includes: a first transistor and a second transistor for absorbing current, the one transistor and the second transistor forming a common emitter and grounding The first and second electrical bases respectively receive a first timing input signal and a second timing input signal; Μ a third transistor and a fourth transistor, which are connected to form a Darlington junction ^ ^ Used to drive current to the second transistor collector, the fourth transistor electrode is connected to the first transistor collector; a fifth transistor and a sixth transistor are connected to form a Darlington junction, 4: Well, a current flows to the first transistor collector, and the sixth transistor is a second transistor collector, wherein the third transistor is connected to the first body electrode and a first external voltage is connected to the first transistor. A third transistor base with a first resistor and a first resistor connected to the second transistor = the fifth transistor base connected in series with a second diode and a first transistor connected to the first transistor Collector; to attract this ί transistor and an eighth transistor, the emitters of which are grounded, f Electricity, the seventh transistor, the first transistor, the eighth transistor, and the second transistor have a common base; the lei: a nine transistor and a tenth transistor are used to provide current, the connection goes It is faithful to the fan base of the seventh electric solar body and the first transistor and the common base electrode. The emitter of the tenth transistor is connected to the connection point between the eighth transistor and the second electrode. Nine transistors are connected to the tenth common collector and connected to a second external voltage; the eleventh transistor is said to be the eleventh transistor and a twelfth transistor, which are connected to form a darlingdi transmission and emission pentode set. Use the No. 1 transistor M255588 VI. Patent application letter chain to construct the '11th transistor base to accept the first timing input The 11th transistor collector is in phase with the 12th transistor base Connection: 垓 The first capacitor is grounded, the emitter of the twelfth transistor is connected via the third base ~ the ninth transistor base is connected to the thirteenth transistor and the fourteenth transistor Transistor, which is connected into a structure. The base of the thirteenth transistor accepts the second timing wheel-in signal. = The twelfth transistor collector is connected to the fourteenth transistor base and grounded via a second capacitor and a capacitor. The fourteenth transistor emitter is in phase with the tenth transistor base through a fourth resistor. Connection, wherein the -th transistor and the t th thirteenth transistor have a common emitter and are connected to the second external voltage. 2 · The bipolar motor driver circuit according to item 1 of the scope of patent application, further comprising: a fifth resistor between the base and the emitter of the first transistor; a sixth resistor between the second resistor and the emitter; Between a crystal base and an emitter; a seventh resistor, one end of which is connected to the fourth transistor base, and the other end is grounded; an eighth resistor, one end of which is connected to the sixth transistor base, and the other is grounded; A ninth resistor, one end of which is connected to the ninth transistor base and the other end is grounded, a tenth resistor, one end of which is connected to the tenth transistor base and the other end is grounded; an eleventh resistor, which is located in the ninth Transistor collector and the second external voltage Page 23 M255588 6. Between patent application scope; and a twelfth resistor between the tenth transistor collector and the second external voltage. 3. Bipolar motor drive as described in item 1 or 2 of the scope of patent application Device circuit, wherein the seventh transistor collector sends a second signal to the fourteenth transistor base, and the eighth transistor collector sends a first signal to the twelfth transistor base, when When the first transistor is not completely turned off, the collector of the seventh transistor is kept at a low potential, so that the second transistor and the fourth transistor cannot be conducted to prevent the first transistor and the fourth transistor from being turned on. The transistor is turned on at the same time. When the second transistor is not completely turned off, the collector of the eighth transistor is kept at a low potential, so that the first transistor and the sixth transistor cannot be conducted to prevent the second transistor. The transistor is turned on simultaneously with the sixth transistor. . 4. The bipolar motor driver circuit according to item 1 or item 2 of the scope of patent application, wherein the seventh transistor collector sends a second signal to the fourteenth transistor emitter, and the eighth transistor The crystal collector sends a first signal to the emitter of the twelfth transistor. When the first transistor is not completely turned off, the collector of the seventh transistor remains at a low potential, causing the second transistor and the transistor to The fourth transistor cannot be turned on to prevent the first transistor and the fourth transistor from being turned on at the same time. When the second transistor is not completely turned off, the collector of the eighth transistor is kept at a low potential, causing the The first transistor and the sixth transistor cannot be connected to prevent the second transistor and the sixth transistor from being simultaneously connected. Page 24 M255588 6. Scope of patent application Conducted. 5 No. Fan Li specially invited Zhongru District to reach the double pole description item 2 Tenth should be the letter No. 1 to No. 1 to send out the pole pole set collective or body crystal item Jingdian T < Electricity eighty-seventh and this, its pole, the base body electric crystal electricity seventy-fourth and the right, and the time body closed crystal off the electricity two completely complete the first body crystal Electricity, the first place should be the lowest, the body holding the base body to collect the crystal body, the nine body of the same body, the body of the body, the crystal, the electricity, the eighth, the body, the body, the body, the electricity, the electricity, and the whole body. The non-stop crystal is used for electricity. The second method is the same. When there is no body crystal, the electricity is the same as the six-body crystal. The electricity and the six-body crystal are integrated with the one-body crystal. In the first place, the power cut-off prevention is low and it is used for holding. Set method 6. A bipolar motor driver circuit, comprising: a first transistor and a second transistor for absorbing current, the first transistor and the second transistor are common emitter and grounded, The first and second transistor bases respectively receive a first timing input signal and a second timing input signal; a third transistor and a fourth transistor are connected into a Darlington structure for driving Current flows to the second transistor collector, and the fourth transistor emitter is connected to the first transistor collector; a fifth transistor and a sixth transistor are connected in a Darlington structure to drive the current To the first transistor collector, the sixth transistor emitter is connected to the second transistor collector, wherein the third transistor is connected to the fifth transistor Page 25 M255588 6. Scope of Patent Application " A ~ —The electric emitter has a common emitter and is connected to a first external voltage. The third transistor beauty pole is connected in series with a first diode and a first resistor and is connected to the first resistor. A second transistor ^ collector; the fifth transistor base is connected in series with a second diode and a first-^, and a resistor connected to the first transistor collector; a seventh transistor and a The eighth transistor has its emitters grounded respectively to absorb current. The seventh transistor and the first transistor have a common base, and the eighth transistor and the second transistor have a common base; a ninth transistor And a tenth transistor for supplying current, the ninth transistor emitter is connected to a connection point between the seventh transistor and a common base of the transistor via a third resistor, the tenth transistor emitter Connected to the common base of the eighth transistor and the second transistor via a first / fourth resistor, wherein the ninth transistor and the tenth transistor form a common collector and are connected to a second voltage; An r an eleventh transistor, which is connected to the ninth transistor, and the eleventh transistor The base receives the first timing input signal, the g ~ transistor collector is connected to the ninth transistor base and grounded via a capacitor; and, the thirteenth transistor is connected to the The tenth transistor is connected to form a Darlington junction. The thirteenth transistor base receives the second timing input signal. The second transistor collector is connected to the tenth transistor base and capacitively grounded. / w I-f. The bipolar motor driver described in item 6 of the patent application scope further includes: α M255588 6. The scope of patent application: a fifth resistor between the base and the emitter of the first transistor; a sixth resistor between the base and the emitter of the second transistor; a seventh resistor, one end The fourth transistor base is connected, and the other end is grounded; and an eighth resistor, one end is connected to the sixth transistor base, and the other end is grounded. 8. The bipolar motor driver circuit according to item 6 or item 7 of the scope of patent application, wherein the seventh transistor collector sends a second signal to the tenth transistor base and the eighth transistor The collector sends a first signal to the ninth transistor base. When the first transistor is not completely turned off, the collector of the seventh transistor remains at a low potential, causing the second transistor and the fourth transistor to The transistor cannot be turned on to prevent the first transistor and the fourth transistor from being turned on at the same time. F When the second transistor is not completely turned off, the collector of the eighth transistor is kept at a low potential, causing the first transistor The transistor and the sixth transistor cannot be conducted to prevent the second transistor and the sixth transistor from being conducted at the same time. 9. The bipolar motor driver circuit according to item 6 or item 7 of the patent application scope, wherein the seventh transistor collector sends a second signal to the tenth transistor emitter, and the eighth transistor The collector sends a first signal to the ninth transistor's emitter. When the first transistor is not completely turned off, the collector of the seventh transistor remains at a low potential, causing the second transistor and the fourth transistor to The transistor cannot be turned on to prevent the first transistor from being the same as the fourth transistor. Page 27 M255588 VI. Conducted when applying for a patent. When the second transistor is not completely turned off, the collector of the eighth transistor remains at a low potential, causing the first transistor and the sixth transistor to fail to conduct. To prevent the second transistor and the sixth transistor from being turned on at the same time. Page 28