A digital io circuit
A circuit and digital technology, applied in the field of digital IO circuits, can solve the problems of not improving the signal effect and slow change, and achieve the effect of improving the signal conversion process, good output slope, and improving performance
Active Publication Date: 2018-04-27
SHENZHEN STATE MICROELECTRONICS CO LTD
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Problems solved by technology
In this way, the switching threshold voltage of the Schmidt circuit is different for the signal in different directions, and a slow-changing input waveform signal is changed into a rapidly flipping signal. However, for the voltage in the signal that is in an indeterminate state area, the circuit has no effect on this part, therefore, for signals in an unsteady state, this circuit has no effect on improving the signal
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[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0019] Figure 4 It is a schematic structural diagram of the digital IO circuit provided by the embodiment of the present invention; for the convenience of description, only the parts related to this embodiment are shown, as shown in the figure:
[0020] A digital IO circuit is used to convert input signals and transmit them to the chip, including a dynamic circuit unit 100 , an input buffer control unit 200 and a Schmidt circuit unit 300 connected in sequence. Among them, the dynamic circuit unit 100 is directly connected to the input signal, which is used to speed up the conversion speed of the ...
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The invention belongs to the field of integrated circuits, in particular to a digital IO circuit. The digital IO circuit provided by the present invention includes a dynamic circuit unit, an input buffer control unit, and a Schmidt circuit unit connected in sequence, and the conversion process of the input signal is accelerated through the dynamic circuit unit, shortening the circuit from "0" to "1". The conversion time shortens the time that the circuit is in an indeterminate state and reduces power consumption; using the Schmidt circuit unit, the switching threshold of the input signal from low level to high level and from high level to low level can be controlled, thereby improving The slope of the circuit signal improves the signal conversion process and signal slope of the circuit, so that the output waveform has a good output slope; further, through the application of the input buffer control unit, the circuit input signal is turned on or off. Control, to ensure the correctness of the entire circuit signal.
Description
technical field [0001] The invention belongs to the field of integrated circuits, in particular to a digital IO circuit. Background technique [0002] With the advancement and development of science and technology, the development of integrated circuits continues to verify Moore's Law. The size of integrated circuit devices continues to shrink, the operating voltage of circuits continues to decrease, and the operating frequency of circuits is getting higher and higher. The frequency and the normal operation of the chip play a very important role. Therefore, it is necessary to design a circuit that improves the performance of digital IO input signals. [0003] For digital IO circuits, the characteristics of the digital signal propagated mainly include: the transmission characteristics of the signal ("0" or "1"), the slope of the waveform, and the frequency of the signal. Therefore, the design of the IO circuit mainly focuses on the characteristics of the signal and the slop...
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IPC IPC(8): H03K19/0185
Inventor 胡瑞明吴志远康海容胡伟平
Owner SHENZHEN STATE MICROELECTRONICS CO LTD