CN-115473515-B - Digital signal output circuit and digital signal output device

CN115473515BCN 115473515 BCN115473515 BCN 115473515BCN-115473515-B

Abstract

The application provides a digital signal output circuit and a digital signal output device, and belongs to the technical field of digital circuits. The digital signal output circuit comprises a digital gating delay module, an inversion module and an output module, wherein the input end of the digital gating delay module is connected with a clock signal and an input signal, the output end of the digital gating delay module is connected with the input end of the inversion module, the digital gating delay module is used for selecting the accessed clock signal and sampling the input signal according to the selected clock signal, the sampled delay signal is sent to the inversion module, the output end of the inversion module is connected with the input end of the output module, the inversion module is used for generating a control signal for the output module based on the delay signal, and the output module is used for generating and outputting a digital signal with the skip time meeting the preset requirement according to the control signal. The application can keep the output digital signal in the preset range.

Inventors

HUANG SHENG
TANG ZHAN
ZOU QING
YU SHAOPING

Assignees

浙江地芯引力科技有限公司

Dates

Publication Date: 20260508
Application Date: 20220929

Claims (9)

1. The digital signal output circuit is characterized by comprising a digital gating delay module, an inversion module and an output module; The input end of the digital gating delay module is connected with a clock signal and an input signal, the output end of the digital gating delay module is connected with the input end of the inverting module, the digital gating delay module is used for selecting the accessed clock signal, sampling the input signal according to the selected clock signal, and sending a delay signal obtained by sampling to the inverting module; The output end of the inversion module is connected with the input end of the output module, and the inversion module is used for generating a control signal to the output module based on the delay signal; the output module is used for generating and outputting a digital signal with the jump time meeting the preset requirement according to the control signal; The digital gating delay module comprises a gating device and a trigger; The input end of the gating device is connected with the clock signal, the control end of the gating device is connected with the selection signal, the output end of the gating device is connected with the second input end of the trigger, and the gating device is used for selecting the clock signal through the selection signal to obtain a target clock signal and transmitting the target clock signal to the trigger; The first input end of the trigger is connected with an input signal, the output end of the trigger is connected with the input end of the inverting module, and the trigger is used for sampling the input signal according to the target clock signal and obtaining a delay signal and sending the delay signal to the inverting module.
2. The digital signal output circuit according to claim 1, wherein the inverting module comprises a first inverter, a second inverter, a first switching tube, a second switching tube, a first output terminal, and a second output terminal; the input end of the first inverter is connected with the output end of the digital gating delay module, the output end of the first inverter is connected with the input end of the second inverter, and the control end of the first inverter is connected with the second end of the first switching tube; the input end of the second inverter is also connected with the second output end, the output end of the second inverter is connected with the first output end, and the control end of the second inverter is connected with the second end of the second switching tube; The first end of the first switching tube and the first end of the second switching tube are respectively connected with a first power supply end, and the third end of the first switching tube is connected with the third end of the second switching tube.
3. The digital signal output circuit according to claim 2, wherein the output module comprises a first resistor, a second resistor, a first switch, a second switch, a load capacitor, and a digital signal output terminal; the first end of the first resistor is connected with the second power supply end, and the second end of the first resistor is connected with the first end of the first switch; the first end of the second resistor is grounded, and the second end of the second resistor is connected with the second end of the second switch; The second end of the first resistor, the first end of the second resistor, the first end of the load capacitor and the digital signal output end are respectively connected, and the second end of the load capacitor is grounded; the control end of the first switch is connected with the first output end of the inverting module, and the control end of the second switch is connected with the second output end of the inverting module.
4. A digital signal output circuit according to claim 3 wherein the first switch and the second switch are in different on-off states at the same time.
5. The digital signal output circuit according to claim 1, wherein the digital signal output circuit further comprises a delay clock generation module; The input end of the delay clock generation module is connected with an initial clock signal, the output end of the delay clock generation module is connected with the input end of the digital gating delay module, and the delay clock generation module is used for carrying out delay processing on the initial clock signal and generating a clock signal with delay.
6. The digital signal output circuit according to claim 5, wherein the delay clock generation module comprises a plurality of delay units connected in series in sequence; each delay unit is used for outputting clock signals with different delays.
7. The digital signal output circuit according to claim 6, wherein the delay unit comprises a plurality of delays and a plurality of delay control switches; Each delay device is sequentially connected in series, each delay device corresponds to one delay control switch, the first end of each delay control switch is connected with the input end of the delay unit, and the second end of each delay control switch is connected with the output end of the corresponding delay device.
8. A digital signal output apparatus, characterized in that the digital signal output apparatus comprises a plurality of digital signal output circuits according to any one of claims 1 to 7 and an output determination unit; the digital signal output circuits are connected in parallel, and the output end of each digital signal output circuit is connected with the output determining unit; the output determining unit is used for determining the jump time of the digital signals output by the digital signal output circuits according to the demand parameters of the digital signal output circuits.
9. The digital signal output apparatus according to claim 8, wherein the demand parameter comprises a capacitance of the load capacitor, a resistance of the first resistor, and a delay of the clock signal.

Description

Digital signal output circuit and digital signal output device Technical Field The present application relates to the field of digital circuits, and in particular, to a digital signal output circuit and a digital signal output device. Background In digital circuits, in order to meet actual signal output requirements, a digital signal output circuit is generally provided for outputting a digital signal, and the jump time of the output digital signal is generally in a preset range. In the prior art, a transmitting circuit is generally arranged, an inverted control signal is generated by the transmitting circuit, and the generation of a digital signal is controlled by the inverted control signal. However, if other loads are added to the circuit for practical reasons, the magnitude of the inverted control signal generated by the transmitting circuit may be affected, so that the jump time of the output digital signal may be affected, for example, the jump time may exceed a preset range, and the obtained digital signal may not meet the practical requirements. Disclosure of Invention The application aims to provide a digital signal output circuit and a digital signal output device, which can keep an output digital signal within a preset range. Embodiments of the present application are implemented as follows: in one aspect of the embodiment of the application, a digital signal output circuit is provided, which comprises a digital gating delay module, an inversion module and an output module; The input end of the digital gating delay module is connected with the clock signal and the input signal, the output end of the digital gating delay module is connected with the input end of the inverting module, the digital gating delay module is used for selecting the accessed clock signal, sampling the input signal according to the selected clock signal, and transmitting the delay signal obtained by sampling to the inverting module; the output end of the inversion module is connected with the input end of the output module, and the inversion module is used for generating a control signal to the output module based on the delay signal; the output module is used for generating and outputting a digital signal with the jump time meeting the preset requirement according to the control signal. Optionally, the digital gating delay module comprises a gating device and a trigger; The input end of the gating device is connected with a clock signal, the control end of the gating device is connected with a selection signal, the output end of the gating device is connected with the second input end of the trigger, and the gating device is used for selecting the clock signal through the selection signal to obtain a target clock signal and transmitting the target clock signal to the trigger; The first input end of the trigger is connected with the input signal, the output end of the trigger is connected with the input end of the inverting module, and the trigger is used for sampling the input signal according to the target clock signal and obtaining a delay signal and sending the delay signal to the inverting module. Optionally, the inverting module comprises a first inverter, a second inverter, a first switch tube, a second switch tube, a first output end and a second output end; The input end of the first inverter is connected with the output end of the digital gating delay module, the output end of the first inverter is connected with the input end of the second inverter, and the control end of the first inverter is connected with the second end of the first switching tube; the input end of the second inverter is also connected with the second output end, the output end of the second inverter is connected with the first output end, and the control end of the second inverter is connected with the second end of the second switch tube; the first end of the first switching tube and the first end of the second switching tube are respectively connected with the first power supply end, and the third end of the first switching tube is connected with the third end of the second switching tube. Optionally, the output module comprises a first resistor, a second resistor, a first switch, a second switch, a load capacitor and a digital signal output end; The first end of the first resistor is connected with the second power supply end, and the second end of the first resistor is connected with the first end of the first switch; the first end of the second resistor is grounded, and the second end of the second resistor is connected with the second end of the second switch; the second end of the first resistor, the first end of the second resistor, the first end of the load capacitor and the digital signal output end are respectively connected, and the second end of the load capacitor is grounded; the control end of the first switch is connected with the first output end of the inverting module, and the control end of the second switch is connected w