TWI493853B - Level translating circuit - Google Patents

Description

Level adjustment circuit

The invention relates to a level adjusting circuit, in particular to a level adjusting circuit which can save circuit design cost and design space and improve use efficiency.

Over the years, with the advancement of electronic technology, people's requirements for electronic related products have also increased. In order to provide people with high quality and low price, how to effectively save the volume of electronic products has become an important issue for today's electronic product designers. Since a general electronic device has a plurality of different electronic components, and most of these electronic components require different operating voltages, it is necessary to pass through a plurality of different voltage regulators in the power supply to correspondingly generate a plurality of different operating voltages. These electronic components are required for the job. However, these voltage regulators cost the circuit design and take up space in the circuit design.

In general, most of the power supplies used in the prior art do not have the function of switching multiple operating voltages, so that the voltage regulators must be simultaneously disposed in the power supply, resulting in redundant circuit design cost and space waste. It also reduces the efficiency of the power supply.

The invention provides a level adjustment circuit, thereby saving circuit design cost and design space, and improving use efficiency.

According to an embodiment of the invention, a level adjustment circuit includes a power supply A supply unit, a level adjustment unit, and a switching unit. The power supply unit is configured to provide a first voltage and a second voltage. The level adjusting unit is coupled to a matching voltage and power supply unit for receiving an input signal, and performing a level adjustment on the input signal according to the matching voltage and the first voltage or the second voltage to generate a first working signal. Or a second work signal. The switching unit is coupled to the level adjusting unit for switching to output the first working signal or the second working signal when the power supply unit switches the first voltage or the second voltage.

The level adjustment circuit provided by the present invention adjusts the input signal according to the matching voltage and the first voltage or the second voltage by the level adjusting unit, thereby generating the first working signal or the second working signal. Switch unit. Then, when the power supply unit switches the first voltage or the second voltage, the switching unit switches to output the first working signal or the second working signal. In this way, the circuit design cost and design space can be effectively saved, and the use efficiency is improved.

The above description of the present invention and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention.

100‧‧‧ level adjustment circuit

102‧‧‧Power supply unit

110‧‧‧Level adjustment unit

120‧‧‧Switch unit

200‧‧‧First electronic components

300‧‧‧Second electronic components

400‧‧‧ Third electronic component

IS‧‧‧Input signal

MV‧‧‧match voltage

S1‧‧‧ trigger signal

V1‧‧‧ first voltage

V2‧‧‧second voltage

WS1‧‧‧ first work signal

WS2‧‧‧ second work signal

Figure 1 is a schematic diagram of the level adjustment circuit of the present invention.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are further detailed The present invention is not intended to limit the scope of the invention in any way.

Please refer to FIG. 1 , which is a schematic diagram of a level adjustment circuit according to an embodiment of the present invention. The level adjustment circuit 100 of this embodiment is adapted to be disposed in a server to generate a first working signal WS1 or a second working signal WS2 of different levels. The level adjustment circuit 100 includes a power supply unit 102, a level adjustment unit 110, and a switching unit 120.

The power supply unit 102 is configured to provide a first voltage V1 and a second voltage V2. In the present embodiment, the first voltage V1 is, for example, P3V3, and the second voltage V2 is, for example, P5V.

The level adjusting unit 110 is coupled to a matching voltage MV and a power supply unit 102 for receiving an input signal IS, and performing a level adjustment on the input signal IS according to the matching voltage MV and the first voltage V1 or the second voltage V2. To generate the first working signal WS1 or the second working signal WS2. Moreover, the first working signal WS1 and the second working signal WS2 each have different levels. The input signal IS, the first working signal WS1, and the second working signal WS2 are, for example, internal Inter-Integrated Circuit (I2C) signals. In this embodiment, the matching voltage MV is, for example, P1V8, and the level adjusting unit 110 can be, for example, a Level Translating Repeater. However, the embodiment is not limited thereto, and the level adjusting unit 110 can also be implemented by using other components similar to the adjustable voltage.

Further, the level adjusting unit 110 further receives a trigger signal S1 to control whether the level adjusting unit 110 operates, and serves as a basis for level adjustment of the input signal IS. For example, when the trigger signal S1 is high, for example, the level adjusting unit 110 performs level adjustment on the input signal IS to generate the first working signal WS1 or the second working signal WS2. When the trigger signal S1 is low, for example, the level adjusting unit 110 does not level adjust the input signal IS, and does not generate the first working signal WS1 or the second working signal WS2.

In this embodiment, the trigger signal S1 can be generated, for example, by a user pressing a button or according to whether the server is operating. For example, when the user presses the button, the trigger signal S1 is, for example, a high level. When the user does not press the button, the trigger signal S1 is, for example, a low level. Or, when the server starts to operate, the trigger signal S1 is, for example, a high level. When the server is not operating, the trigger signal S1 is, for example, low.

The switching unit 120 is coupled to the level adjusting unit 110, the first electronic component 200, and the second electronic component 300, and the switching unit 120 is configured to switch the output first when the power supply unit 102 switches the first voltage V1 or the second voltage V2. Work signal WS1 or second work signal WS2. That is, when the power supply unit 102 switches the first voltage V1, the switching unit 120 switches, for example, to output the first operational signal WS1 to the first electronic component 200. When the power supply unit 102 switches the second voltage V2, the switching unit 120 switches, for example, to output the second working signal WS2 to the second electronic component 300. The first electronic component 200 and the second electronic component 300 may be referred to as downstream devices, for example. Moreover, the aforementioned first voltage V1 and second voltage V2 are used to match the first electronic component 200 and the second electronic component 300, respectively.

In this embodiment, the switching unit 120 can be, for example, a 0 ohm resistor, or the switching unit 120 can include, for example, a Bipolar Junction Transistor (BJT) or a Metal Oxide Semiconductor Field Effect Transistor. , MOSFET), resistor or a combination thereof. However, the embodiment is not limited thereto, and the switching unit 120 may also include other similar components to implement. The first electronic component 200 can be, for example, a Peripheral Interface Controller (PIC), and the second electronic component 300 can be, for example, a Complex Programmable Logic Device (CPLD). However, the embodiment is not limited thereto, and the first electronic component 200 may also be implemented by using other similar components, and The two electronic components 300 can also be implemented using other similar components.

In addition, the level adjustment unit 110 of the present embodiment is coupled to a third electronic component 400, and the first electronic component 200 or the second electronic component 300 is coupled to the third electronic component 400 via an internal integrated circuit bus, for example. The interface between the first electronic component 200 and the third electronic component 400 for data transmission, or the interface between the second electronic component 300 and the third electronic component 400 for data transmission. Among them, the third electronic component 400 can be referred to as an upstream device, for example. In this embodiment, the third electronic component 400 can be, for example, a system on a chip (SOC). However, the embodiment is not limited thereto, and the third electronic component 400 may also be implemented using other similar components. In addition, the aforementioned matching voltage MV is used to match the input signal IS to the first electronic component 200 and the second electronic component 300, and the value of the matching voltage MV is determined by the third electronic component 400 of the input signal IS.

For example, when the switching unit 120 switches the output of the first working signal WS1 to the first electronic component 200, the transmission paths of the first electronic component 200 and the third electronic component 400 may be formed such that the first electronic component 200 and the third component The electronic component 400 performs data transmission. When the switching unit 120 switches the output of the second working signal WS2 to the second electronic component 300, the transmission paths of the second electronic component 300 and the third electronic component 400 may be formed, so that the second electronic component 300 and the third electronic component 400 are performed. Data transmission.

In summary, the level adjustment circuit disclosed in the embodiment of the present invention adjusts the input signal according to the matching voltage and the first voltage or the second voltage by the level adjusting unit, thereby generating the first The work signal or the second work signal is sent to the switching unit. Then, when the power supply unit switches the first voltage or the second voltage, the switching unit switches to output the first working signal or the second working signal. In this way, circuit design cost and design space can be effectively saved, and Improve usage efficiency.

Although the present invention has been disclosed above in the foregoing embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

100‧‧‧ level adjustment circuit

102‧‧‧Power supply unit

110‧‧‧Level adjustment unit

120‧‧‧Switch unit

200‧‧‧First electronic components

300‧‧‧Second electronic components

400‧‧‧ Third electronic component

IS‧‧‧Input signal

MV‧‧‧match voltage

S1‧‧‧ trigger signal

V1‧‧‧ first voltage

V2‧‧‧second voltage

WS1‧‧‧ first work signal

WS2‧‧‧ second work signal

Claims (7)

A level adjustment circuit includes: a power supply unit for providing a first voltage and a second voltage; a level adjustment unit coupled to a matching voltage and the power supply unit for receiving an input signal, And performing a level adjustment on the input signal according to the matching voltage and the first voltage or the second voltage to generate a first working signal or a second working signal; and a switching unit coupled to the level The adjusting unit is configured to switch to output the first working signal or the second working signal when the power supply unit switches the first voltage or the second voltage, wherein the switching unit is a 0 ohm resistor. The level adjustment circuit of claim 1, wherein the matching voltage is used to match the input signal to a first electronic component and a second electronic component, and the value of the matching voltage is a third electronic component of the input signal. Component decision. The level adjustment circuit of claim 1, wherein the first voltage and the second voltage are used to match the first electronic component and the second electronic component, respectively. The level adjustment circuit of claim 1, wherein the input signal, the first working signal and the second working signal are internal integrated circuit signals. The level adjustment circuit of claim 1, wherein the level adjustment unit further receives a trigger signal to control whether the level adjustment unit operates. The level adjustment circuit of claim 1, wherein the level adjustment unit is a level shifting repeater. The level adjustment circuit of claim 1, wherein the level adjustment circuit is configured on a server in.