An adjustable pulse width boost circuit arrangement

Abstract

The utility model belongs to the field of electronic information and communication technology, apply to high voltage erasing or high voltage destruction test, concretely is a kind of adjustable pulse width boost circuit device, including timing circuit and boost circuit, be provided with trigger end and output in timing circuit, be provided with enable end and output in boost circuit, the output of timing circuit and the enable end of boost circuit are connected.Timing circuit is triggered by outside, exports high level signal;The high level signal of timing circuit is as boost circuit enable end input, enable end high level is effective, and boost circuit exports high voltage.The utility model device simple structure can be conveniently set in the equipment that need to pass through high voltage erasing or destroying secret data, so it is not needed under the condition of external special equipment, can conveniently output required high voltage signal.The utility model can adjust output time and output voltage under the condition of needing to generate high voltage, to meet the high voltage demand under different scenes.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of electronic information and communication technology, apply to high voltage erasing or high voltage destruction test, concretely is a kind of adjustable pulse width boost circuit device. BACKGROUND

[0002] Many devices need high voltage to erase or destroy the data in storage chip, but need to obtain the required adjustable high voltage by external special equipment under special conditions, to erase or destroy the data of storage chip in equipment, to ensure that the storage data is not leaked. This situation brings inconvenience to the erasing or destroying of confidential data. SUMMARY

[0003] The utility model provides a kind of adjustable pulse width boost circuit device for the problem that equipment needs to erase or destroy confidential data needs external equipment to provide high voltage.

[0004] The utility model is adopted as follows Technical scheme is realized: a kind of adjustable pulse width boost circuit device, including timing circuit and boost circuit, trigger end and output end are provided in timing circuit, enable end and output end are provided in boost circuit, the output end of timing circuit and the enable end of boost circuit are connected.

[0005] The adjustable pulse width boost circuit device described above, timing circuit includes the chip D1 of model NA555D, Pin1 of chip D1 is grounded, Pin2 is trigger end and is grounded by trigger switch S1, Pin2 is also connected power supply VCC by resistance R1, Pin3 is used as output end, Pin3 is grounded by light-emitting diode V1 and resistance R3, Pin4 and Pin8 are connected power supply VCC, Pin6 and Pin7 are connected, Pin6 is grounded by capacitor C1, Pin6 is also connected power supply VCC by first adjustable resistance R2;

[0006] Boost circuit includes the chip D5 of model LM2733, Pin5 of chip D5 is connected power supply VCC, is also grounded by capacitor C35, Pin4 is enable end, Pin4 is connected with the Pin3 of chip D1, Pin2 of chip D5 is grounded, Pin3 is grounded by resistance R5, Pin1 is connected with Pin5 by inductance L1, Pin1 is also connected with the anode of stabilivolt V2, the cathode of stabilivolt V2 is connected with second adjustable resistance R4 and Pin3, second adjustable resistance R4 is also connected with capacitor C84 in parallel across terminals, the cathode of stabilivolt V2 is also grounded by capacitor C83, the cathode of stabilivolt V2 is used as output end.

[0007] The timing circuit outputs a high level signal through external triggering; the high level signal of the timing circuit is input as an enable end of the boost circuit, the enable end is high level effective, and the boost circuit outputs a high voltage.

[0008] The utility model discloses a high voltage output time and output voltage can be adjusted to meet the high voltage demand under different scenes, and has the following beneficial effects: 1) reduce the use loss of external special equipment, 2) time adjustable, output voltage adjustable, can satisfy a variety of test demand. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is the principle diagram of the utility model.

[0010] Figure 2 It is the principle diagram of the timing circuit.

[0011] Figure 3 It is the principle diagram of the boost circuit. DETAILED DESCRIPTION

[0012] The utility model discloses adjustable type pulse width boost circuit device includes timing circuit and boost circuit. The timing circuit takes the chip of NA555D as the main part, realizes the high level signal of output fixed time length through external triggering, and the boost circuit takes the chip of LM2733 as the main part, realizes high voltage output, and the high level signal of timing circuit is as the chip enable end input of type LM2733, and the enable end is high level effective, and the high level signal effective time of timing circuit is as high voltage output effective time, and the connection relation is as shown in Figure 1 .

[0013] The timing circuit is as shown in Figure 2As shown, including the model of the chip D1 NA555D, Pin1 of chip D1 ground, Pin2 through the trigger switch S1 ground, Pin2 also through the resistor R1 power supply VCC, Pin3 as output, Pin3 through the light emitting diode V1 and resistor R3 ground, Pin4 and Pin8 connection power supply VCC, Pin6 and Pin7 connection, Pin6 through the capacitor C1 ground, Pin6 also through the first adjustable resistor R2 power supply VCC, when the chip D1 model SE555D power supply, Pin3 output is in the closed state, low level, capacitor C1 through the first adjustable resistor R2 begins to charge; When the external trigger switch S1 is pressed, Pin2 is grounded, capacitor C1 discharge, Pin3 output end open, output high level, as the enable signal of LM2733 in the boost circuit; Capacitor C1 through the first adjustable resistor R2 is charged again, when Pin6 detects the positive voltage of capacitor is 2 / 3 of power supply VCC, Pin3 output end is closed. The time of the positive voltage of capacitor C1 from 0 to 2 / 3 VCC when charging again is the time T of Pin3 output high level, the calculation formula of T is T=1.1×R2×C1. R2 is adjustable resistor, the resistance value can be modified by external knob, so as to realize the dynamic adjustment of output high level time.

[0014] The boost circuit is as shown in Figure 3 As shown, including the model of the chip D5 LM2733, Pin5 of chip D5 power supply VCC, also through the capacitor C35 ground, Pin4 is the enable end, Pin4 and Pin3 of chip D1 are connected, Pin2 of chip D5 ground, Pin3 through the resistor R5 ground, Pin1 through the inductor L1 and Pin5 connection, Pin1 also and the anode of the stabilizing tube V2 connection, the cathode of the stabilizing tube V2 through the second adjustable resistor R4 and Pin3 connection, the second adjustable resistor R4 both ends also have capacitor C84 in parallel, the cathode of the stabilizing tube V2 also through the capacitor C83 ground, the cathode of the stabilizing tube V2 as output, output voltage Vout, the chip D5 model LM2733 mainly realizes the boost of the input power supply VCC, the reference voltage of LM2733 is 1.23V, the external resistance is divided, and the output voltage Vout can be calculated by using the calculation formula R4=R5×(Vout / 1.23-1) (wherein R4 is adjustable resistor), the resistance value of R4 is adjusted, so as to realize the dynamic adjustment of output high voltage amplitude.

Claims

1. An adjustable pulse width boost circuit arrangement, characterized by: The timing circuit is provided with a trigger end and an output end, and the boost circuit is provided with an enable end and an output end, and the output end of the timing circuit is connected with the enable end of the boost circuit.

2. The adjustable pulse width boost circuit arrangement of claim 1, wherein: The timing circuit comprises a chip D1 of model NA555D, Pin1 of the chip D1 is grounded, Pin2 is a trigger end and is grounded through a trigger switch S1, Pin2 is also connected with a power supply VCC through a resistor R1, Pin3 is an output end, Pin3 is grounded through a light emitting diode V1 and a resistor R3, Pin4 and Pin8 are connected with the power supply VCC, Pin6 and Pin7 are connected, Pin6 is grounded through a capacitor C1, Pin6 is also connected with the power supply VCC through a first adjustable resistor R2; The boost circuit comprises a chip D5 of model LM2733, Pin5 of the chip D5 is connected with the power supply VCC and is also grounded through a capacitor C35, Pin4 is an enable end and is connected with Pin3 of the chip D1, Pin2 of the chip D5 is grounded, Pin3 is grounded through a resistor R5, Pin1 is connected with Pin5 through an inductor L1, Pin1 is also connected with an anode of a stabilizing tube V2, a cathode of the stabilizing tube V2 is connected with Pin3 through a second adjustable resistor R4, the second adjustable resistor R4 is also connected with a capacitor C84 in parallel, the cathode of the stabilizing tube V2 is also grounded through a capacitor C83, and the cathode of the stabilizing tube V2 is an output end.

Images