NEGATIVE POWER SUPPLY LINE SWITCHING CIRCUIT

Abstract

The invention relates to a MOSFET-based switching circuit used in the field of electronic circuits and power electronics, which enables the negative power supply line on electronic boards to be switched on or off safely, controllably, and stably using a low-voltage control signal.

Description

1 TARIFF NEGATIVE POWER SUPPLY LINE SWITCHING CIRCUIT Technical Area The invention is used in electronic circuits and power electronics, in electronic boards. The negative power supply line found is controlled using a low-voltage control signal. 5 ensuring safe, controlled and stable activation or deactivation It relates to a MOSFET-based switching circuit that provides this functionality. State of the Art In order to safely manage different voltage levels in electronic systems. Controlled activation or deactivation of positive and negative power supply lines. It needs to be removed. Especially analog circuits, measurement systems, industrial. control boards, communication equipment, power electronics applications, and bipolar (±) In electronic boards that use power supplies, the negative power supply line is controlled. Switching is a crucial necessity. In the known state of the art, relays for controlling negative power supply lines are mechanical 15 switches, bipolar junction transistors (BJT), MOSFET-based switching circuits, Analog switch integrated circuits and various semiconductor switching elements are used. These solutions involve direct switching or control of the negative supply line. During this process, a potential is formed between the reference potential of the control signal and the negative power line. Various design challenges arise due to voltage differences. 20 Driving the negative voltage line, especially using low-level control signals. In applications where this is required, the switching element must be correctly polarized. This can become difficult because the control signal cannot provide sufficient driving voltage. It is possible that the element may not be able to transition to full conduction or full cutoff. This... As a result, unwanted leakage currents, unstable switching, high power losses, 25 switching delays and operating conditions that negatively affect circuit reliability It can occur. In addition, there is a voltage surge during direct switching of the negative supply line. transitions, changes in reference potential, reverse polarity effects, and control circuitry. 30 problems caused by potential differences between power circuits 2 there is also a risk of damage to electronic components or system malfunction. Therefore, existing solutions require additional driver circuits and leveling. (level shifting) stages, optical isolation elements, or auxiliary power supplies This can be used, but it complicates the circuit design and increases the cost. and requires additional space on the card. 5 Application number US6249458B1 concerns a common negative voltage source connected to multiple negative voltage sources. with a MOSFET-based switching structure that enables the transfer to the supply line It is related to the application, negative voltage input lines, common negative voltage output line, main It includes switching MOSFETs and low-voltage control signals, Switching is performed via logic gates and driver circuits. 10 However, the application states that the main switching MOSFET is indirectly controlled by a low-voltage control signal. a separate control MOSFET manages the stable driving of the main MOSFET. the auxiliary / driving MOSFET that provides and the voltage levels at the MOSFET terminals There is no resistance network in place to prevent unwanted transmissions by identifying them. In conclusion, due to the negative aspects described above and the current solutions regarding issue 15 Due to its shortcomings, an improvement is needed in the relevant technical field. It has been made. Purpose of the Invention The invention was created by drawing inspiration from existing situations and overcoming the aforementioned drawbacks. It aims to solve. 20 The main purpose of the invention is to reduce the voltage of the negative power supply line in electronic circuits. ensuring safe, stable and controlled commissioning using a control signal or developing a circuit structure that allows it to be deactivated. The purpose of the invention is to control the negative power supply line during direct switching. Undesirable 25 caused by voltage differences that may occur between the signal and the power line. The aim is to reduce the risks of transmission, unstable operation, and damage to circuit components. Within the scope of the invention, the control of the negative voltage line, MOSFET elements and their associated components are discussed. through a switching structure consisting of associated resistive connections This is done by connecting the low-level control signal to the negative supply line. This ensures reliable management and makes the switching process more controlled. 30 is being brought. 3 Another aim of the invention is to remove negative power without the need for additional complex driver circuits. To ensure reliable management of the power supply line on the electronic board, different simple, economical and applicable to electronic systems with varying voltage levels Our goal is to offer a highly reliable solution. Thus, the invention includes power supply circuits, control boards, and a negative supply line of 5 Safe and stable in various electronic systems that require controlled management. It provides a switching structure. The structural and characteristic features and all the advantages of the invention are given in the figures below. This becomes clearer thanks to the detailed explanation written with references to these figures. This will be understood, and therefore the evaluation should also take these forms and detailed explanations into account. 10 It needs to be done by taking precautions. Figures that will help understand the invention. Figure 1 shows the switching circuit that is the subject of the invention. Explanation of Part References 1. Negative voltage input line 15 2. Negative voltage output line 3. Switching element 4. Control element 5. Assistant 6. Resistance network 20 7. Low voltage control line Detailed Description of the Invention This detailed description explains the negative power supply line switching circuit that is the subject of the invention. preferred structures are solely for the purpose of better understanding the subject. It is explained. 25 In the example application shown in Figure 1, the circuit is; negative voltage input line (1), negative voltage output line (2), switching element (3), control element (4), auxiliary element (5), It consists of a resistor network (6) and a low voltage control line (7). In this context, the invention, 4 The negative power supply line is a switching circuit, and the negative line to be controlled... negative voltage input line (1) to which the supply voltage is applied to the circuit, switching operation negative voltage output, which then enables the negative supply voltage to be transferred to the output. line (2), transfer of negative supply voltage to negative voltage output line (2) or output Switching element (3) that enables separation from the line, low voltage control line (7) 5 depending on the control signal applied through it, the switching element (3) The control element (4) that controls the operation ensures the stable operation of the circuit. Auxiliary element (5) that enables the switching element (3) to be driven, voltage associated with switching element (3), control element (4) and auxiliary element (5) Resistance network (6) 10 that reduces unwanted transmission conditions by determining their levels It includes. In the example application shown in Figure 1, the circuit is; negative voltage input line (1), negative voltage output line (2), switching element (3), control element (4), auxiliary element (5), It consists of a resistor network (6) and a low voltage control line (7). The negative voltage input line (1) is the negative supply voltage to be controlled, 15 It is the input line where it is applied. The negative voltage output line (2), after the switching operation This line enables the controlled transfer of the negative supply voltage to the output. Switching element (3), negative voltage input line (1) and negative voltage output line (2) the main one that enables the establishment or termination of the electrical connection between them It is a switching element. The switching element (3) is preferably a MOSFET. 20 In a preferred configuration of the invention, the switching element (3) is an N-Channel MOSFET It is structured in this way. Thanks to this structure, it is especially suitable for applications requiring high current. Switching of negative power supply lines is possible. Some known negative P-channel MOSFETs are preferred in voltage switching applications. Together, the use of P-Channel MOSFETs in applications requiring high current is 25%. can create limitations in terms of current carrying capacity and transmission losses In return, the invention uses an N-Channel MOSFET as the switching element (3). This structure allows for the switching of higher currents. especially the controlled switching of high-current negative supply voltages required military radar systems and similar high-performance electronics 30 It provides an advantage in applications. The control element (4) receives the control signal applied via the low voltage control line (7). Depending on the switch, it is the element that controls the operation of the switching element (3). element (5) helps to properly drive the switching element (3) and It is the element that ensures the stable operation of the circuit. Control element (4) and auxiliary element (5) preferably MOSFET based. 5 with resistor network (6), switching element (3), control element (4) and auxiliary element (5) By determining the associated voltage levels, it reduces unwanted conduction conditions and the circuit It is a resistance structure that contributes to its safe operation. Low voltage control line (7), Controlled activation or deactivation of the negative power line It is the line to which the control signal is applied. 10 The negative supply voltage to be checked is via the negative voltage input line (1). is applied to the circuit. The negative supply voltage in question is converted into a negative voltage output. transfer to line (2) or disconnect from the output line, switching element (3) It is carried out by. The control signal applied via the low voltage control line (7) activates the control element (4) 15 It operates. The control element (4) switches together with the auxiliary element (5). by ensuring that the element (3) is driven properly, the transmission of the switching element or determines the cut-off status. In this way, the negative voltage input line (1) and the negative The electrical connection between the voltage output line (2) is established in a controlled manner or is being cut. 20 with resistor network (6), switching element (3), control element (4) and auxiliary element (5) It contributes to determining the associated voltage levels, unwanted transmission. It helps prevent these situations and ensures the circuit is safe and stable. It supports his work. Thanks to this working structure, the negative power supply line is connected to a low-voltage control signal 25 using electronically without the need for a mechanical switching element. It can be activated or deactivated. Thus, with a control signal. instability that may result from voltage differences between the positive and negative power supply lines. The study aims to reduce unwanted transmission and similar negative situations. The invention is a 30-degree independent negative power supply line switching circuit. It can be used as an auxiliary circuit structure within various electronic systems. 6 It can also be used. For example, the invention utilizes negative in an RF switching structure. It can be applied for the purpose of controlling the supply line. However, the invention... Its application area is not limited to RF switching systems, but also includes the negative power supply line. In power supply circuits where controlled switching is required, control 5 also in cards and electronic systems where different voltage levels are managed applicable. In one application example, the circuit uses a processor operating at approximately 3.3V logic level. Using the control signal supplied from the general purpose input / output (GPIO) pin, approximately −5 Negative power supply at level V and with relatively high current requirements. It enables the controlled switching of the line. However, these voltage levels are 10 This is for illustrative purposes only, and the invention involves different control signal levels and different negative It is also suitable for use with supply voltages.

Claims

7 REQUESTS 1. The negative power supply line is a switching circuit, and its characteristics are:  the negative supply voltage to be controlled is applied to the circuit negative voltage input line (1),  After the switching process, the negative supply voltage is 5 at the output. negative voltage output line (2) that enables transmission,  Transferring the negative supply voltage to the negative voltage output line (2) or Switching element (3) that enables separation from the output line,  dependent on the control signal applied via the low voltage control line (7) control element 10 which controls the operation of the switching element (3) (4),  to ensure the stable operation of the circuit, the switching element (3) Auxiliary element that enables it to be driven (5),  related to the switching element (3), control element (4) and auxiliary element (5) resistor 15 that reduces unwanted conduction conditions by determining voltage levels. It includes the network (6).

2. According to claim 1, the negative power supply line is a switching circuit, and its characteristics are: switching element (3), control element (4) and auxiliary element (5) MOSFET It is based on. 20 3. According to claim 1, the negative power supply line is a switching circuit, and its characteristic is; The issue is that the MOSFET is N-channel.

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