CN215682255U - Push-pull turn-on leakage output driving circuit - Google Patents

Abstract

The utility model discloses a push-pull turn-on leakage output driving circuit, which comprises: the power supply comprises a first triode, a second triode, a first resistor, a first power supply, a power supply input end and a power supply output end; the base electrode of the first triode is connected with the collector electrode of the second triode and the first resistor, the collector electrode of the first triode is connected with the power output end, and the emitting electrode of the first triode is grounded; the base electrode of the second triode is connected with the power input end, and the emitting electrode of the second triode is grounded; the first resistor is connected to the first power source. The utility model converts the push-pull signal in the chip into the open-drain signal in the external circuit, reduces the internal loss of the chip, adjusts the level conversion speed through the external resistor, can realize the NAND relationship by using the same pull-up resistor in the short circuit of a plurality of pins, and the level of the open-drain output depends on the voltage connected with the pull-up resistor and is not directly related to the power supply of the chip.

Description

Push-pull turn-on leakage output driving circuit

Technical Field

The utility model relates to the technical field of circuits, in particular to a push-pull turn-on leakage output driving circuit.

Background

At present, the general input/output interface has two modes: open-drain (open-drain) and push-pull (push-pull); in fact, the push-pull output is internally that two triodes are respectively controlled by complementary signals, the other triode is always cut off when one triode is conducted, and only one switching tube of two symmetrical power switching tubes is conducted each time when the circuit works, so that the conduction loss is small, the efficiency is high, and the output can be used for filling current into a load or extracting current from the load; the open-drain output refers to a drain output circuit of a MOS tube, and a pull-up resistor is added to a power supply by a circuit outside a drain electrode. However, in the push-pull output of the prior art, only one push-pull output device is arranged on one bus in the CMOS circuit, the output capability is determined by the area of the internal transistor of the IC, the push-pull output needs to consume more current and more power consumption compared with the open-drain output, and the high and low levels of the output of the push-pull circuit are a fixed value and depend on the power supply of the IC.

Accordingly, there is a need in the art for improvements.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the embodiment of the utility model is as follows: a push-pull turn-on leakage output driving circuit is provided to solve the problems in the prior art.

According to an aspect of an embodiment of the present invention, a circuit for push-pull turn-off drain output driving is disclosed, including:

the power supply comprises a first triode, a second triode, a first resistor, a first power supply, a power supply input end and a power supply output end;

the base electrode of the first triode is connected with the collector electrode of the second triode and the first resistor, the collector electrode of the first triode is connected with the power output end, and the emitting electrode of the first triode is grounded;

the base electrode of the second triode is connected with the power input end, and the emitting electrode of the second triode is grounded;

the first resistor is connected to the first power source.

In another embodiment, the first power supply is +5 volts.

Compared with the prior art, the utility model has the following advantages:

the circuit for driving the push-pull turn-on leakage output converts a push-pull signal in a chip into an open leakage signal in an external circuit, reduces the internal loss of the chip, adjusts the level conversion speed through an external resistor, can realize the NAND relationship by using the same pull-up resistor for multi-pin short circuit, depends on the voltage connected with the pull-up resistor, is not directly related to a chip power supply, can adjust the speed of logic level conversion through the external pull-up resistor, and can realize the logic function through the external open leakage circuit.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings used in the description of the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of the structure of one embodiment of the push-pull turn-off drain output driving circuit of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The circuit of the push-pull turn-on drain output driving provided by the utility model is described in more detail with reference to the accompanying drawings and embodiments.

As shown in fig. 1, the circuit of the push-pull turn-off drain output drive of this embodiment includes:

the power supply comprises a first triode Q1, a second triode Q2, a first resistor R1, a first power supply VCC, a power supply input end VIN and a power supply output end VOUT;

the base electrode of the first triode Q1 is connected with the collector electrode of the second triode Q2 and a first resistor R1, the collector electrode of the first triode Q1 is connected with the power output end VOUT, and the emitter electrode of the first triode Q1 is grounded;

the base electrode of the second triode Q2 is connected with the power supply input end VIN, and the emitter electrode of the second triode Q2 is grounded;

the first resistor R1 is connected to the first power source VCC.

The first power supply VCC is +5 volts.

Specifically, the working principle of the push-pull turn-on leakage output driving circuit of the present application is as follows:

when the output of the power input terminal VIN is at a high level, the second transistor Q2 is turned on, and the first transistor Q1 is turned off; when the output of the power input end VIN is at a low level, the first triode Q1 is turned on;

in use, if the power output terminal VOUT cannot output a high level, a pull-up resistor may be disposed at the power output terminal VOUT, so that the open-collector output of the first transistor Q1 may be used as a level shifter to implement different level shifting through the pull-up resistor.

The push-pull turn-on drain output driving circuit provided by the utility model is described in detail above, a specific example is applied in the present document to explain the principle and the implementation mode of the utility model, and the description of the above embodiment is only used to help understanding the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims (2)

1. A push-pull turn-on drain output driven circuit, comprising:

the power supply comprises a first triode, a second triode, a first resistor, a first power supply, a power supply input end and a power supply output end;

the base electrode of the first triode is connected with the collector electrode of the second triode and the first resistor, the collector electrode of the first triode is connected with the power output end, and the emitting electrode of the first triode is grounded;

the base electrode of the second triode is connected with the power input end, and the emitting electrode of the second triode is grounded;

the first resistor is connected to the first power source.

2. The circuit of claim 1, wherein the first power supply is +5 volts.

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