CN214799446U - Signal output circuit and delay signal output circuit - Google Patents
Signal output circuit and delay signal output circuit Download PDFInfo
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- CN214799446U CN214799446U CN202120502728.XU CN202120502728U CN214799446U CN 214799446 U CN214799446 U CN 214799446U CN 202120502728 U CN202120502728 U CN 202120502728U CN 214799446 U CN214799446 U CN 214799446U
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Abstract
The embodiment of the application provides a signal output circuit and time delay signal output circuit, wherein, signal output circuit includes: the first control module receives a first pulse signal and an input signal and outputs a first adjusting signal, wherein a first preset edge of the first adjusting signal has first delay relative to a rising edge of the input signal; the second control module receives the second pulse signal and the input signal and outputs a second adjusting signal, and a second preset edge of the second adjusting signal has a second delay relative to a falling edge of the input signal; the signal output module receives the first adjusting signal and the second adjusting signal and outputs a delay output signal, wherein the rising edge of the delay output signal is generated based on a first preset edge of the first adjusting signal, and the falling edge of the delay output signal is generated based on a second preset edge of the second adjusting signal; the embodiment of the application generates the delay signal with controllable delay, and the area of the circuit layout is small, and the power consumption of the circuit is small.
Description
Technical Field
The present disclosure relates to the field of semiconductor circuit design, and more particularly, to a signal output circuit and a delay signal output circuit.
Background
In semiconductor circuit design, a staggered (Stagger) signal is often used, and the staggered signal refers to a signal generated at regular intervals and with a fixed delay.
For the synchronization signal, the equidistant interleaving signal is usually generated by means of a clock signal; for asynchronous signals, delay units (delay cells) are inserted to generate required equidistant staggered signals, and delay between signals can be realized by inserting corresponding delay units according to requirements. The method adopts a mode that synchronous signals generate equidistant staggered signals, the delay among the equidistant staggered signals is integral multiple of a clock period, and the controllability of the delay among the equidistant staggered signals is poor; by adopting the mode of generating equidistant staggered signals by asynchronous signals, although the delay controllability between the signals is good, the area of the formed circuit layout and the power consumption of the circuit can be obviously increased.
However, the applicant finds that adjusting the signal delay of the equidistant staggered signals through the period of the pulse signals can reduce the area of a circuit layout and the power consumption of the circuit, and the delay between the signals does not need to be integral multiples of a clock period.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a signal output circuit and a delay signal output circuit, which are used for generating delay signals with controllable delay according to a first pulse signal and a second pulse signal, and the area of a circuit layout is small, and the power consumption of the circuit is small.
To solve the above technical problem, an embodiment of the present application provides a signal output circuit, including: the first control module receives a first pulse signal and an input signal and outputs a first adjusting signal, wherein a first preset edge of the first adjusting signal has a first delay relative to a rising edge of the input signal, and the first delay is a pulse period of the first pulse signal; the second control module receives the second pulse signal and the input signal and outputs a second adjusting signal, a second preset edge of the second adjusting signal has a second delay relative to a falling edge of the input signal, and the second delay is a pulse period of the second pulse signal; and the signal output module receives the first adjusting signal and the second adjusting signal and outputs a delay output signal, wherein the rising edge of the delay output signal is generated based on the first preset edge of the first adjusting signal, and the falling edge of the delay output signal is generated based on the second preset edge of the second adjusting signal.
Compared with the prior art, the delay output signal with controllable delay is generated according to the first pulse signal and the second pulse signal, relative to the input signal, the delay output signal has a first delay on the rising edge and a second delay on the falling edge; the first delay is the pulse period of the first pulse signal, and the second delay is the pulse period of the second pulse signal, so that the delay time of the delayed output signal can be adjusted by adjusting the pulse periods of the first pulse signal and the second pulse signal; meanwhile, the delay time of the delay output signal is adjusted without accessing more delay units, so that the circuit structure is simplified, the area of a circuit layout is small, and the power consumption of the circuit is low.
The pulse period of the first pulse signal is equal to the pulse period of the second pulse signal. The pulse period of the first pulse signal is controlled to be consistent with the pulse period of the second pulse signal, so that the delay time of the rising edge and the falling edge of the generated delay output signal is ensured to be consistent, and the delay output signal is ensured to delay the input signal.
In addition, one pulse of the first pulse signal is aligned with the rising edge of the input signal, and one pulse of the second pulse signal is aligned with the falling edge of the input signal.
In addition, the first pulse signal and the second pulse signal are staggered pulse signals.
In addition, the signal output module includes: a first receiving unit which receives the first pulse signal and the first adjustment signal, and generates a first pulse control signal when the first adjustment signal is at an active level, wherein the pulse phase of the first pulse control signal is the same as the pulse phase of the first pulse signal; a second receiving unit which receives the second pulse signal and the second adjustment signal, and generates a second pulse control signal when the second adjustment signal is at an active level, wherein a pulse phase of the second pulse control signal is the same as a pulse phase of the second pulse signal; and the latch unit receives the first pulse control signal and the second pulse control signal and generates a delay output signal.
In addition, the first receiving unit is further configured to receive a first control signal, and the first receiving unit is configured to generate a first pulse control signal according to the first pulse signal during a period in which the first adjustment signal and the first control signal are at an active level. Through the regulation and control of the first control signal, the stability of the output of the first receiving unit is ensured.
In addition, the first receiving unit includes a first receiving nand gate, the first receiving nand gate includes a first input terminal, a second input terminal and a first output terminal, the first input terminal is used for receiving the first adjusting signal, the second input terminal is used for receiving the first pulse signal, and the first output terminal is used for outputting the first pulse control signal.
In addition, the second receiving unit is further configured to receive a second control signal, and the second receiving unit is configured to generate a second pulse control signal according to the second pulse signal during a period in which the second adjustment signal and the second control signal are at an active level. And the stability of the output of the second receiving unit is ensured through the regulation and control of the second control signal.
In addition, the second receiving unit includes a second receiving nand gate, the second receiving nand gate includes a third input end, a fourth input end and a second output end, the third input end is used for receiving the second adjusting signal, the fourth input end is used for receiving the second pulse signal, and the second output end is used for outputting the second pulse control signal.
In addition, the latch unit includes: the latch comprises a fifth input end, a sixth input end and a third output end, wherein the fifth input end is used for receiving the first pulse control signal, the sixth input end is used for receiving the second pulse control signal, and the third output end is used for outputting the delay output signal.
In addition, the latch unit is configured to: when the first pulse control signal and the second pulse control signal are at different levels, the delay output signal and the second pulse control signal are at the same level; when the first pulse control signal and the second pulse control signal are at a high level, the latch unit maintains a state.
In addition, the first control module includes: and the clock end of the first D flip-flop is used for receiving the first pulse signal, the reset end of the first D flip-flop is used for receiving the first reset signal, the input end of the first D flip-flop is used for receiving the input signal, and the output end of the first D flip-flop is used for outputting the first adjusting signal.
In addition, the second control module includes: and the clock end of the second D trigger is used for receiving a second pulse signal, the reset end of the second D trigger is used for receiving a second reset signal, the input end of the second D trigger is used for receiving an input signal, and the output end of the second D trigger is connected with the phase inverter in series and then outputs a second adjusting signal.
In addition, the signal output circuit further includes: and the even number of inverters are connected with the output end of the signal output module in series so as to enhance the driving capability of the signal output module.
The embodiment of the application also provides a delay signal output circuit, which comprises G signal output circuits, wherein G is an integer greater than or equal to 2; each stage of signal output circuit is used for receiving the delayed output signal output by the previous stage of signal output circuit and generating the delayed output signal of the current stage based on the first pulse signal, the second pulse signal and the delayed output signal output by the previous stage of signal output circuit; the non-first-stage signal output circuits receive a delay output signal output by a previous-stage signal output circuit as an input signal of a current-stage signal output circuit, and the first-stage signal output circuit receives an initial input signal as an input signal of the first-stage signal output circuit; the rising edge of the delay output signal generated by the signal output circuit and the rising edge of the delay output signal output by the previous stage of signal output circuit have first delay; the falling edge of the delayed output signal generated by the signal output circuit and the falling edge of the received delayed output signal output by the previous stage signal output circuit have a second delay.
The pulse periods of the first pulse signal and the second pulse signal are equal.
In addition, the first control module of the signal output circuit is also used for receiving a first control signal, the second control module of the signal output circuit is also used for receiving a second control signal, and the first control signal and the second control signal are inverted signals; and each stage of signal output circuit is used for generating a current stage of delayed output signal according to the first control signal, the second control signal, the first pulse signal, the second pulse signal and the delayed output signal output by the previous stage of signal output circuit.
In addition, the delayed signal output circuit further includes: the initial signal output circuit comprises a first control module, a second control module and a signal output module; the first control module is used for receiving the first pulse signal and the first power supply signal and generating a first adjusting signal according to the first pulse signal and the first power supply signal; the second control module is used for receiving the second pulse signal and the second power supply signal and generating a second adjusting signal according to the second pulse signal and the second power supply signal; and the signal output module is used for generating an initial input signal according to the first adjusting signal and the second adjusting signal. The input signal generated by the initial signal output circuit is adopted to reduce the signal delay error caused by the circuit structure and ensure the accuracy of the generated delay output signal.
Compared with the related art, the delay control circuit comprises a signal output circuit, a delay control circuit and a control circuit, wherein the signal output circuit is used for generating a delay signal with controllable delay according to a first pulse signal and a second pulse signal, and the delay signal has a first delay on a rising edge and a second delay on a falling edge relative to an input signal; the other signal output circuits continue delaying the generated delay signals so as to generate equidistant staggered (Stagger) signals; meanwhile, the delay time of the delay signal is adjusted without accessing more delay units, so that the circuit structure is simplified, the area of a circuit layout is small, and the power consumption of the circuit is low.
Drawings
Fig. 1 is a schematic structural diagram of a signal output circuit according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a first control module according to an embodiment of the present disclosure;
fig. 3 is a schematic circuit diagram of a second control module according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a signal output module according to an embodiment of the present application;
fig. 5 and fig. 6 are specific circuit schematic diagrams of a signal output module according to an embodiment of the present application;
FIG. 7 is a timing diagram of signals in a signal output circuit according to an embodiment of the present application;
fig. 8 and 9 are schematic structural diagrams of a delayed signal output circuit according to another embodiment of the present application;
fig. 10 is a specific circuit diagram of a delayed signal output circuit according to another embodiment of the present application;
fig. 11 is a schematic circuit diagram of a signal output circuit in a delayed signal output circuit according to another embodiment of the present application;
fig. 12 is a timing diagram of signals in a delayed signal output circuit according to another embodiment of the present application.
Detailed Description
The mode of generating equidistant staggered signals by synchronous signals is adopted, the delay among the equidistant staggered signals must be integral multiple of the clock period, and the controllability of the delay among the equidistant staggered signals is poor; by adopting the mode of generating equidistant staggered signals by asynchronous signals, although the delay controllability between the signals is good, the area of the formed circuit layout and the power consumption of the circuit can be obviously increased.
To solve the above problem, an embodiment of the present application provides a signal output circuit, including: the first control module receives a first pulse signal and an input signal and outputs a first adjusting signal, wherein a first preset edge of the first adjusting signal has a first delay relative to a rising edge of the input signal, and the first delay is a pulse period of the first pulse signal; the second control module receives the second pulse signal and the input signal and outputs a second adjusting signal, a second preset edge of the second adjusting signal has a second delay relative to a falling edge of the input signal, and the second delay is a pulse period of the second pulse signal; and the signal output module receives the first adjusting signal and the second adjusting signal and outputs a delay output signal, wherein the rising edge of the delay output signal is generated based on the first preset edge of the first adjusting signal, and the falling edge of the delay output signal is generated based on the second preset edge of the second adjusting signal.
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in the examples of the present application, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present application, and the embodiments may be combined with each other and cited as reference to each other without contradiction.
Fig. 1 is a schematic structural diagram of a signal output circuit provided in this embodiment, fig. 2 is a schematic specific circuit diagram of a first control module provided in this embodiment, fig. 3 is a schematic specific circuit diagram of a second control module provided in this embodiment, fig. 4 is a schematic structural diagram of a signal output module provided in this embodiment, fig. 5 and fig. 6 are schematic specific circuit diagrams of a signal output module provided in this embodiment, fig. 7 is a schematic timing diagram of a signal in a signal output circuit provided in this embodiment, and the signal output circuit provided in this embodiment is further described in detail below with reference to the drawings.
Referring to fig. 1, the signal output circuit 500 includes: the first control module 501 receives the first pulse signal ActClk and the input signal actbank 0, and outputs a first adjustment signal ActLat, where a first preset edge of the first adjustment signal ActLat has a first delay with respect to a rising delay of the input signal actbank 0, and the first delay is a pulse period of the first pulse signal ActClk.
In one example, the rising edge or the falling edge of the first pulse signal ActClk may be used to sample the input signal actbank 0 and then output the first adjustment signal ActLat; or delays the output input signal ActBnk0 after detecting the rising edge or the falling edge of the first pulse signal ActClk, thereby acquiring the first adjustment signal ActLat.
In this embodiment, the first predetermined edge is taken as an example of a rising edge; specifically, the input signal ActBnk0 is an external input signal (compared to the signal output circuit 500), and the signal output circuit 500 is configured to generate the delayed output signal ActBnk1 according to the input signal ActBnk 0; wherein the rising edge of the delayed output signal ActBuk 1 is generated based on the rising edge of the first adjusting signal ActLat, the rising edge of the first adjusting signal ActLat having a first delay with the rising edge of the input signal ActBuk 0; that is, the rising edge of the delayed output signal actnk 1 and the rising edge of the input signal actnk 0 have a first delay, which is the pulse period of the first pulse signal ActClk, and thus it can be seen that the externally input first pulse signal ActClk is used to adjust the delay of the rising edge of the delayed output signal actnk 1. It should be noted that, in other embodiments, the first preset edge may also be a falling edge.
It should be noted that, in the description herein that the rising edge of the "delayed output signal actnk 1 is generated based on the first preset edge of the first adjusting signal ActLat," based "means including but not limited to: the rising edge of the delayed output signal ActBnk1 is generated when the first preset edge of the first adjusting signal ActLat is detected, or the rising edge of the delayed output signal ActBnk1 is generated after the first adjusting signal ActLat is changed from low level to high level (high level to low level).
In one example, referring to fig. 2, the first control module 501 includes a first D flip-flop 511, a clock terminal for receiving the first pulse signal ActClk, a reset terminal for receiving the first reset signal fnActEn, an input terminal for receiving the input signal ActBnk0, and an output terminal for outputting the first adjustment signal ActLat.
With continued reference to fig. 1, signal output circuit 500 further includes: the second control module 502 receives the second pulse signal PreClk and the input signal actnk 0, and outputs a second adjustment signal PreLat, wherein a second preset edge of the second adjustment signal PreLat has a second delay with respect to a falling edge of the input signal actnk 0, and the second delay is a pulse period of the second pulse signal PreClk.
In this embodiment, the second predetermined edge is taken as an example of a rising edge; specifically, the falling edge of the delayed output signal actnk 1 is generated based on the rising edge of the second adjustment signal PreLat, which has a second delay with the falling edge of the input signal actnk 0; that is, the falling edge of the delayed output signal actnk 1 and the falling edge of the input signal actnk 0 have a second delay, which is the pulse period of the second pulse signal PreClk, so that the externally input second pulse signal PreClk is used to adjust the delay of the falling edge of the delayed output signal actnk 1. It should be noted that, in other embodiments, the second predetermined edge may also be a falling edge.
It should be noted that, in the description herein that the falling edge of the "delayed output signal actnk 1 is generated based on the second preset edge of the second adjusting signal PreLat," the "based" meaning includes but is not limited to: the falling edge of the delayed output signal actnk 1 is generated when the second preset edge of the second adjusting signal PreLat is detected, or the falling edge of the delayed output signal actnk 1 is generated after the second adjusting signal PreLat is changed from low level to high level (high level to low level).
In one example, referring to fig. 3, the second control module 502 includes a second D flip-flop 512 having a clock terminal for receiving the second pulse signal PreClk, a reset terminal for receiving the second reset signal fnPreEn, an input terminal for receiving the input signal actnk 0, and an output terminal connected in series with an inverter for outputting the second adjustment signal PreLat.
In this embodiment, the pulse period of the first pulse signal ActClk is equal to the pulse period of the second pulse signal PreClk, and the delay degree of the rising edge of the first adjustment signal ActLat is the same as the delay degree of the rising edge of the second adjustment signal PreLat. In other embodiments, the pulse periods of the first pulse signal and the second pulse signal may be different.
In addition, in the present embodiment, one of the pulses of the first pulse signal ActClk is aligned with a rising edge of the input signal actnk 0, and one of the pulses of the second pulse signal PreClk is aligned with a falling edge of the input signal actnk 0. It should be noted that "alignment" described herein is not necessarily perfect alignment in an ideal case, and may include slight differences in rising/falling edges due to circuit delay and the like. Aligning one of the pulses of the first pulse signal ActClk with a rising edge of the input signal actnk 0 to ensure accuracy of the first delay of the first signal edge of the first adjustment signal ActLat and the rising edge of the input signal actnk 0; the accuracy of the second delay of the second signal edge of the second adjustment signal PreLat and the falling edge of the input signal actnk 0 is ensured by aligning one of the pulses of the second pulse signal PreClk with the falling edge of the input signal actnk 0. With continued reference to fig. 1, signal output circuit 500 further includes: the signal output module 503 receives the first adjustment signal ActLat and the second adjustment signal PreLat and outputs a delayed output signal ActBnk1, wherein a rising edge of the delayed output signal ActBnk1 is generated based on a first preset edge of the first adjustment signal ActLat, and a falling edge of the delayed output signal ActBnk1 is generated based on a second preset edge of the second adjustment signal PreLat.
Specifically, referring to fig. 4, the signal output module 503 includes: the first receiving unit 513 receives the first pulse signal ActClk and the first adjustment signal ActLat, generates a first pulse control signal ActN having a pulse phase identical to that of the first pulse signal ActClk while the first adjustment signal ActLat is at an active level, and the second receiving unit 523 receives the second pulse signal PreClk and the second adjustment signal PreLat, generates a second pulse control signal PreN having a pulse phase identical to that of the second pulse signal PreClk while the second adjustment signal PreLat an active level. The latch unit 533 receives the first pulse control signal ActN and the second pulse control signal PreN, and delays the output signal ActBnk 1.
In one example, when the first adjustment signal ActLat is detected as being active, the first pulse control signal ActN is generated by the first pulse signal ActClk based on an inverter; when the second adjustment signal PreLat is detected to be at the active level, the second pulse control signal PreN is generated by the second pulse signal PreClk based on the inverter.
In one example, referring to fig. 5, the first receiving unit 513 includes a first receiving nand gate 601, where the first receiving nand gate 601 includes a first input terminal for receiving the first adjusting signal ActLat, a second input terminal for receiving the first pulse signal ActClk, and a first output terminal for outputting the first pulse control signal ActN. The second receiving unit 523 includes a second receiving nand gate 602, and the second receiving nand gate 602 includes a third input end, a fourth input end and a second output end, the third input end is used for receiving the second adjusting signal PreLat, the fourth input end is used for receiving the second pulse signal PreClk, and the second output end is used for outputting the second pulse control signal PreN. The latch unit 533 includes a latch 603, and the latch 603 includes a fifth input terminal for receiving the first pulse control signal ActN, a sixth input terminal for receiving the second pulse control signal PreN, and a third output terminal for outputting the delayed output signal actbn 1.
The latch unit 603 is configured to: when the first pulse control signal ActN and the second pulse control signal PreN are at different levels, the delay output signal ActBunk 1 is at the same level as the second pulse control signal PreN; when the first pulse control signal ActN and the second pulse control signal PreN are at a high level, the latch unit 603 maintains a state.
Specifically, when the first pulse signal ActN and the second pulse control signal PreN are at a high level, the latch unit 603 maintains a state; when the first pulse signal ActN is at a high level and the second pulse signal control signal PreN is at a low level, the latch unit 603 outputs a low level; when the first pulse signal ActN is at a low level and the second pulse signal control signal PreN is at a high level, the latch unit 603 outputs a high level.
In another example, the first receiving unit 513 is further configured to receive the first control signal ActEn, and the first receiving unit 513 is configured to generate the first pulse control signal ActN according to the first pulse signal ActClk during the period when the first adjusting signal ActLat and the first control signal ActEn are at the active level. The second receiving unit 523 is further configured to receive the second control signal PreEn, and the second receiving unit 523 is configured to generate the second pulse control signal PreN according to the second pulse signal PreClk when the second adjustment signal PreLat and the second control signal PreEn are at active levels.
Referring to fig. 6, the first receiving nand gate 601 is further configured to receive the first control signal ActEn, and the first receiving nand gate 601 generates the first pulse control signal ActN according to the first clock signal ActClk, the first control signal ActEn, and the first adjustment signal ActLat. The second receiving nand gate 602 is further configured to receive a second control signal PreEn, and the second receiving nand gate 602 generates a second pulse control signal PreN according to a second clock signal PreClk, the second control signal PreEn and a second adjustment signal PreLat. The first control signal ActEn and the second control signal PreEn are inverted signals, the first pulse signal ActClk exists during the period when the first control signal ActEn is at the active level, and the second pulse signal PreClk exists during the period when the second control signal PreEn is at the active level. The first and second receiving nand gates 601 and 602 receive the first and second control signals ActEn and PreEn, respectively, to ensure the stability of the outputs of the first and second receiving nand gates 601 and 602.
Further, the first pulse signal ActClk and the second pulse signal PreClk are interleaved pulse signals, i.e. pulse signals generated according to inverted signals; in the present embodiment, the first pulse signal ActClk exists during the first control signal ActEn is at the active level, and the start pulse of the first pulse signal ActClk is aligned with the rising edge of the first control signal ActEn; the second pulse signal PreClk exists during the period when the second control signal PreEn is at the active level, and the start pulse of the second pulse signal PreClk is aligned with the rising edge of the second control signal PreEn; it should be noted that "alignment" described herein is not necessarily perfect alignment in an ideal case, and may include slight differences in rising/falling edges due to circuit delay and the like.
In one example, referring to fig. 7, the input signal actnk 0, the first pulse signal ActClk, and the second pulse signal PreClk are external input signals; assume that the period of the first pulse signal ActClk is t1 and the period of the second pulse signal PreClk is t 2. Referring to fig. 2, the first adjustment signal ActLat is generated based on the input signal actbank 0 and the first pulse signal actbank, when the first pulse signal actbank is at a high level, the secondary state of the first adjustment signal ActLat is the current state of the input signal actbank 0, which causes a first delay between the rising edge of the first adjustment signal ActLat and the rising edge of the input signal actbank 0, the first delay being the period of the first pulse signal actbank, i.e., the delay between the rising edge of the first adjustment signal ActLat and the rising edge of the input signal actbank 0 is t 1. Referring to fig. 3, the second adjustment signal PreLat is generated based on the input signal actnk 0 and the second pulse signal prellk, and when the second pulse signal prellk is at a high level, the secondary state of the second adjustment signal PreLat is the current state of the input signal actnk 0, which causes a second delay between the rising edge of the second adjustment signal PreLat and the falling edge of the input signal actnk 0, where the second delay is the period of the second pulse signal PreLat, i.e., the delay between the rising edge of the second adjustment signal PreLat and the falling edge of the input signal actnk 0 is t 2. With reference to fig. 6, in order to ensure the stability of the outputs of the first and second receiving nand gates 601 and 602, the first receiving nand gate 601 is further configured to receive the first control signal ActEn, the second receiving nand gate 602 is further configured to receive the second control signal PreEn, and the first and second control signals ActEn and PreEn are inverted signals. At this time, the first receiving nand gate 601 and the second receiving nand gate 602 generate the first pulse control signal ActN and the second pulse control signal PreN, respectively. The latch unit 603 generates a delayed output signal ActBnk1 according to the first pulse control signal ActN and the second pulse control signal PreN, wherein a rising edge of the delayed output signal ActBnk1 and a rising edge of the input signal ActBnk0 have a first delay, and the first delay is a pulse period t1 of the first pulse signal ActClk; the falling edge of the delayed output signal ActBnk1 has a second delay from the falling edge of the input signal ActBnk0, the second delay being the pulse period t2 of the second pulse signal PreClk. In the present embodiment, the pulse periods of the first pulse signal ActClk and the second pulse signal PreClk are equal, i.e., the signal transition edge of the delayed output signal actnk 1 is delayed by an equal time relative to the signal transition edge of the input signal actnk 0. It should be noted that the timing chart of each signal shown in fig. 7 is only used for explaining the circuit function of the signal output circuit 500 provided in the present embodiment, and is not limited to the present embodiment; in other embodiments, the corresponding delayed input signal may be generated from other input signals; in addition, the input signal may not coincide with the first control signal.
It should be noted that, in other embodiments, the signal output circuit further includes an even number of inverters, and the inverters are connected in series with the output end of the signal output module to enhance the driving capability of the signal output circuit.
Compared with the related art, the delay output signal with controllable delay is generated according to the first pulse signal and the second pulse signal, and compared with the input signal, the delay output signal has a first delay on a rising edge and a second delay on a falling edge; the first delay is the pulse period of the first pulse signal, and the second delay is the pulse period of the second pulse signal, so that the delay time of the delayed output signal can be adjusted by adjusting the pulse periods of the first pulse signal and the second pulse signal; meanwhile, the delay time of the delay output signal is adjusted without accessing more delay units, so that the circuit structure is simplified, the area of a circuit layout is small, and the power consumption of the circuit is low.
It should be noted that, in this embodiment, all units are logic units, and in practical application, one logic unit may be one physical unit, may also be a part of one physical unit, and may also be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present application, a unit that is not so closely related to solving the technical problem proposed by the present application is not introduced in the present embodiment, but this does not indicate that there is no other unit in the present embodiment.
Another embodiment of the present application relates to a delay signal output circuit, including G of the above signal output circuits, G being an integer greater than or equal to 2; each stage of signal output circuit is used for receiving the delayed output signal output by the previous stage of signal output circuit and generating the delayed output signal of the current stage based on the first pulse signal, the second pulse signal and the delayed output signal output by the previous stage of signal output circuit; the non-first-stage signal output circuits receive a delay output signal output by a previous-stage signal output circuit as an input signal of a current-stage signal output circuit, and the first-stage signal output circuit receives an initial input signal as an input signal of the first-stage signal output circuit; the rising edge of the delay output signal generated by the signal output circuit and the rising edge of the delay output signal output by the previous stage of signal output circuit have first delay; the falling edge of the delayed output signal generated by the signal output circuit and the falling edge of the received delayed output signal output by the previous stage signal output circuit have a second delay.
Fig. 8 and 9 are schematic structural diagrams of the delay signal output circuit provided in this embodiment, fig. 10 is a schematic specific circuit diagram of the delay signal output circuit provided in this embodiment, fig. 11 is a schematic specific circuit diagram of a signal output circuit in the delay signal output circuit provided in this embodiment, and fig. 12 is a schematic timing diagram of a signal in the delay signal output circuit provided in this embodiment.
A delayed signal output circuit comprising: g signal output circuits 500 of the above embodiments, G being an integer of 2 or more; each stage of signal output circuit is used for receiving the delayed output signal output by the previous stage of signal output circuit and generating the delayed output signal of the current stage based on the first pulse signal ActClk, the second pulse signal PreClk and the delayed output signal output by the previous stage of signal output circuit; the non-first-stage signal output circuits receive a delay output signal output by a previous-stage signal output circuit as an input signal of a current-stage signal output circuit, and the first-stage signal output circuit receives an initial input signal as an input signal of the first-stage signal output circuit; the rising edge of the delay output signal generated by the signal output circuit and the rising edge of the delay output signal output by the previous stage of signal output circuit have first delay; the falling delay of the delayed output signal generated by the signal output circuit and the falling edge of the received delayed output signal output by the previous stage signal output circuit have a second delay.
In this embodiment, the pulse period of the first pulse signal ActClk is t1, the pulse period of the second pulse signal PreClk is t2, and the pulse period of the first pulse signal ActClk is equal to the pulse period of the second pulse signal PreClk; in other embodiments, the pulse periods of the first pulse signal and the second pulse signal may be different.
Referring to fig. 8, in the present embodiment, a specific description is given by taking an example that the delayed signal output circuit 700 includes 7 signal output circuits 500 provided in the above embodiments, and the delayed signal output circuit is not limited to the present embodiment, and specifically includes a first-stage signal output circuit 701, a second-stage signal output circuit 702, a third-stage signal output circuit 703, a fourth-stage signal output circuit 704, a fifth-stage signal output circuit 705, a sixth-stage signal output circuit 706, and a seventh-stage signal output circuit 707. In other embodiments, the delayed signal output circuit may include 2 or more signal output circuits.
Specifically, the first-stage signal output circuit 701 generates a first-stage delayed output signal ActBnk1 according to the initial input signal ActBnk0, the first pulse signal ActClk and the second pulse signal PreClk, wherein a rising edge of the first-stage delayed output signal ActBnk1 has a first delay with respect to a rising edge of the initial input signal actnk 0, and the first delay is a pulse period t1 of the first pulse signal ActClk; the falling edge of the first stage delayed output signal actnk 1 has a second delay relative to the falling edge of the initial input signal actnk 0, the second delay being the pulse period t2 of the second pulse signal PreClk.
The second-stage signal output circuit 702 generates a second-stage delay output signal ActBnk2 according to the first-stage delay output signal ActBnk1, the first pulse signal ActClk and the second pulse signal PreClk, and the rising edge of the second-stage delay output signal ActBnk2 has a first delay relative to the first-stage delay output signal ActBnk 1; the falling edge of the second stage delayed output signal ActBnk2 has a second delay relative to the first stage delayed output signal ActBnk 1.
The third-stage signal output circuit 703 generates a third-stage delayed output signal ActBnk3 according to the second-stage delayed output signal ActBnk2, the first pulse signal ActClk and the second pulse signal PreClk, wherein the rising edge of the third-stage delayed output signal ActBnk3 has a first delay relative to the second-stage delayed output signal ActBnk 2; the falling edge of the third stage delayed output signal ActBnk3 has a second delay relative to the second stage delayed output signal ActBnk 2.
The fourth stage signal output circuit 704 generates a fourth stage delayed output signal actnk 4 according to the third stage delayed output signal actnk 3, the first pulse signal ActClk and the second pulse signal PreClk, and a rising edge of the fourth stage delayed output signal actnk 4 has a first delay relative to the third stage delayed output signal actnk 3; the falling edge of the fourth stage delayed output signal ActBnk4 has a second delay relative to the third stage delayed output signal ActBnk 3.
The fifth-stage signal output circuit 705 generates a fifth-stage delayed output signal ActBnk5 according to the fourth-stage delayed output signal ActBnk4, the first pulse signal ActClk and the second pulse signal PreClk, wherein the rising edge of the fifth-stage delayed output signal ActBnk5 has a first delay relative to the fourth-stage delayed output signal ActBnk 4; the falling edge of the fifth stage delayed output signal ActBnk5 has a second delay relative to the fourth stage delayed output signal ActBnk 4.
The sixth-stage signal output circuit 706 generates a sixth-stage delayed output signal ActBnk6 according to the fifth-stage delayed output signal ActBnk5, the first pulse signal ActClk and the second pulse signal PreClk, wherein a rising edge of the sixth-stage delayed output signal ActBnk6 has a first delay relative to the fifth-stage delayed output signal ActBnk 5; the falling edge of the sixth stage delayed output signal ActBnk6 has a second delay relative to the fifth stage delayed output signal ActBnk 5.
The seventh-stage signal output circuit 707 generates a seventh-stage delayed output signal actnk 7 according to the sixth-stage delayed output signal actnk 6, the first pulse signal ActClk, and the second pulse signal PreClk, and a rising edge of the seventh-stage delayed output signal actnk 7 has a first delay with respect to the sixth-stage delayed output signal actnk 6; the falling edge of the seventh stage delayed output signal ActBunk 7 has a second delay relative to the sixth stage delayed output signal ActBunk 6.
Referring to fig. 9, more specifically, in the present embodiment, the first control block of the signal output circuit is further configured to receive a first control signal ActEn, and the second control block of the signal output circuit is further configured to receive a second control signal PreEn, where the first pulse signal ActClk and the second pulse signal PreClk are inverted signals; each stage of signal output circuit is used for generating a current stage of delay output signal according to the first control signal ActEn, the second control signal PreEn, the first pulse signal ActClk, the second pulse signal PreClk and the delay output signal output by the previous stage of signal output circuit, and the stability of the output of the signal output circuit is ensured by receiving the first control signal ActEn and the second control signal PreEn.
With continued reference to fig. 9, in this embodiment, the delayed signal output circuit 700 further includes: an initial signal output circuit 710 including a first control module, a second control module, and a signal output module; a first control module, configured to receive the first pulse signal ActClk and the first power supply signal Vdd, and generate a first adjustment signal (not shown) according to the first pulse signal ActClk and the first power supply signal Vdd; a second control module of the output signal output circuit, configured to receive the second pulse signal PreClk and the second power signal Vss, and generate a second adjustment signal (not shown) according to the second pulse signal PreClk and the second power signal Vss; and a signal output module for generating an initial input signal according to a first adjustment signal (not shown) and a second adjustment signal (not shown). The delayed output signals of the initial signal output circuit generated according to the first power signal Vdd and the second power signal Vss, that is, the initial input signal actnk 0 output according to the initial signal output circuit 710 may avoid a delay caused by circuit elements of the signal output circuit compared to the initial input signal actnk 0 directly input from the outside. The circuit of the initial signal output circuit 710 may be the same as the signal output circuit described above, and is not described herein, but the present embodiment is not limited thereto.
In one example, referring to fig. 10 and 11, a delayed signal output circuit 700 composed of 4 signal output circuits is described as an example. The first clock end ActClk of the signal output circuit is used for receiving a first pulse signal ActClk; the second clock terminal PreClk of the signal output circuit is used for receiving a second pulse signal PreClk; the first control terminal ActEn of the signal output circuit is used for receiving a first control signal ActEn; the second control terminal PreEn of the signal output circuit is used for receiving a second control signal PreEn; the signal output end ActBnk of the signal output circuit is used for outputting a delay output signal of the current stage; the signal output circuit further includes a first signal terminal ActEnPre and a second signal terminal PreEnPre (signal input terminal of the signal output circuit), and in conjunction with fig. 11, the first signal terminal ActEnPre of the initial signal output circuit is configured to receive the first power supply signal Vdd, and the second signal terminal PreEnPre of the initial signal output circuit is configured to receive the second power supply signal Vss; the first signal terminal ActEnPre and the second signal terminal PreEnPre of the other signal output circuit are used for receiving the delay output signal output by the previous stage signal output circuit.
Referring to fig. 9 and 12, according to the previous embodiment, the first-stage signal output circuit 701 generates a first-stage delayed output signal ActBnk1 according to the initial input signal ActBnk0, the second-stage signal output circuit 702 generates a second-stage delayed output signal ActBnk2 according to the first-stage delayed output signal ActBnk1, the third-stage signal output circuit 703 generates a third-stage delayed output signal ActBnk3 according to the second-stage delayed output signal ActBnk2, the fourth-stage signal output circuit 704 generates a fourth-stage delayed output signal ActBnk4 (not shown) according to the third-stage delayed output signal ActBnk3, the fifth-stage signal output circuit generates a fifth-stage delayed output signal ActBnk5 (not shown) according to the fourth-stage delayed output signal ActBnk4, the sixth-stage signal output circuit 706 generates a sixth-stage delayed output signal ActBnk6 (not shown) according to the fifth-stage delayed output signal ActBnk 63705, and the seventh-stage signal output circuit generates a seventh-stage delayed output signal ActBnk7 (not shown) according to the sixth-stage delayed output signal ActBnk 68562.
Compared with the prior art, the signal output circuit is used for generating a delay signal with controllable delay according to the first pulse signal and the second pulse signal, and relative to the input signal, the delay signal has a first delay on a rising edge and a second delay on a falling edge; the other signal output circuits continue delaying the generated delay signals so as to generate equidistant staggered (Stagger) signals; meanwhile, the delay time of the delay signal is adjusted without accessing more delay units, so that the circuit structure is simplified, the area of a circuit layout is small, and the power consumption of the circuit is low.
It should be noted that, in this embodiment, all units are logic units, and in practical application, one logic unit may be one physical unit, may also be a part of one physical unit, and may also be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present application, a unit that is not so closely related to solving the technical problem proposed by the present application is not introduced in the present embodiment, but this does not indicate that there is no other unit in the present embodiment.
Since the above embodiments correspond to the present embodiment, the present embodiment can be implemented in cooperation with the above embodiments. Related technical details mentioned in the above embodiments are still valid in this embodiment, and the technical effects that can be achieved in the above embodiments can also be achieved in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the above-described embodiments.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the present application, and that various changes in form and details may be made therein without departing from the spirit and scope of the present application in practice.
Claims (18)
1. A signal output circuit, comprising:
the first control module receives a first pulse signal and an input signal and outputs a first adjusting signal, wherein a first preset edge of the first adjusting signal has a first delay relative to a rising edge of the input signal, and the first delay is a pulse period of the first pulse signal;
the second control module receives a second pulse signal and the input signal and outputs a second adjusting signal, wherein a second preset edge of the second adjusting signal has a second delay relative to a falling edge of the input signal, and the second delay is a pulse period of the second pulse signal;
and the signal output module receives the first adjusting signal and the second adjusting signal and outputs a delay output signal, wherein the rising edge of the delay output signal is generated based on a first preset edge of the first adjusting signal, and the falling edge of the delay output signal is generated based on a second preset edge of the second adjusting signal.
2. The signal output circuit according to claim 1, wherein a pulse period of the first pulse signal and a pulse period of the second pulse signal are equal.
3. The signal output circuit of claim 1, wherein one of the pulses of the first pulse signal is aligned with a rising edge of the input signal and one of the pulses of the second pulse signal is aligned with a falling edge of the input signal.
4. The signal output circuit according to claim 3, wherein the first pulse signal and the second pulse signal are interleaved pulse signals.
5. The signal output circuit according to claim 1, wherein the signal output module comprises:
a first receiving unit configured to receive the first pulse signal and the first adjustment signal, and generate a first pulse control signal during a period in which the first adjustment signal is at an active level, wherein a pulse phase of the first pulse control signal is the same as a pulse phase of the first pulse signal;
a second receiving unit configured to receive the second pulse signal and the second adjustment signal, and generate a second pulse control signal during a period in which the second adjustment signal is at an active level, wherein a pulse phase of the second pulse control signal is the same as a pulse phase of the second pulse signal;
and the latch unit receives the first pulse control signal and the second pulse control signal and generates the delay output signal.
6. The signal output circuit of claim 5, wherein the first receiving unit is further configured to receive a first control signal, and the first receiving unit is configured to generate the first pulse control signal according to the first pulse signal during a period in which the first adjustment signal and the first control signal are active levels.
7. The signal output circuit of claim 5, wherein the first receiving unit comprises a first receiving NAND gate, the first receiving NAND gate comprises a first input terminal, a second input terminal and a first output terminal, the first input terminal is configured to receive the first adjusting signal, the second input terminal is configured to receive the first pulse signal, and the first output terminal is configured to output the first pulse control signal.
8. The signal output circuit of claim 5, wherein the second receiving unit is further configured to receive a second control signal, and the second receiving unit is configured to generate the second pulse control signal according to the second pulse signal during a period in which the second adjustment signal and the second control signal are active levels.
9. The signal output circuit of claim 5, wherein the second receiving unit comprises a second receiving NAND gate, the second receiving NAND gate comprises a third input terminal, a fourth input terminal and a second output terminal, the third input terminal is configured to receive the second adjustment signal, the fourth input terminal is configured to receive the second pulse signal, and the second output terminal is configured to output the second pulse control signal.
10. The signal output circuit according to claim 5, wherein the latch unit includes: the latch comprises a fifth input end, a sixth input end and a third output end, the fifth input end is used for receiving the first pulse control signal, the sixth input end is used for receiving the second pulse control signal, and the third output end is used for outputting the delay output signal.
11. The signal output circuit of claim 10, wherein the latch unit is configured to:
when the first pulse control signal and the second pulse control signal are at different levels, the delay output signal and the second pulse control signal are at the same level;
when the first pulse control signal and the second pulse control signal are at a high level, the latch unit maintains a state.
12. The signal output circuit of claim 1, wherein the first control module comprises: and the clock end of the first D flip-flop is used for receiving the first pulse signal, the reset end of the first D flip-flop is used for receiving the first reset signal, the input end of the first D flip-flop is used for receiving the input signal, and the output end of the first D flip-flop is used for outputting the first adjusting signal.
13. The signal output circuit of claim 1, wherein the second control module comprises: and the clock end of the second D trigger is used for receiving the second pulse signal, the reset end of the second D trigger is used for receiving a second reset signal, the input end of the second D trigger is used for receiving the input signal, and the output end of the second D trigger is connected with the phase inverter in series and then outputs the second adjusting signal.
14. The signal output circuit according to claim 1, further comprising: and the even number of inverters are connected with the output end of the signal output module in series.
15. A time-delayed signal output circuit comprising G signal output circuits according to any one of claims 1 to 14, wherein G is an integer of 2 or more;
each stage of signal output circuit is used for receiving the delayed output signal output by the previous stage of signal output circuit and generating the delayed output signal of the current stage based on the first pulse signal, the second pulse signal and the delayed output signal output by the previous stage of signal output circuit;
the non-first-stage signal output circuits receive a delay output signal output by a previous-stage signal output circuit as an input signal of a current-stage signal output circuit, and the first-stage signal output circuit receives an initial input signal as an input signal of the first-stage signal output circuit;
the rising edge of the delay output signal generated by the signal output circuit and the rising edge of the delay output signal output by the previous stage of signal output circuit have first delay;
the falling edge of the delayed output signal generated by the signal output circuit and the falling edge of the received delayed output signal output by the previous stage signal output circuit have a second delay.
16. The delay signal output circuit of claim 15, wherein the pulse periods of the first pulse signal and the second pulse signal are equal.
17. The delayed signal output circuit of claim 15, wherein the first control block of the signal output circuit is further configured to receive a first control signal, the second control block of the signal output circuit is further configured to receive a second control signal, and the first control signal and the second control signal are inverted signals;
each stage of signal output circuit is used for generating the delayed output signal of the current stage according to the first control signal, the second control signal, the first pulse signal, the second pulse signal and the delayed output signal output by the previous stage of signal output circuit.
18. The delayed signal output circuit of claim 15, further comprising:
the initial signal output circuit comprises a first control module, a second control module and a signal output module;
the first control module is used for receiving a first pulse signal and a first power supply signal and generating a first adjusting signal according to the first pulse signal and the first power supply signal;
the second control module is configured to receive a second pulse signal and a second power signal, and generate the second adjustment signal according to the second pulse signal and the second power signal;
the signal output module is configured to generate the initial input signal according to the first adjustment signal and the second adjustment signal.
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