CN211506289U - Circuit system for detecting dual-threshold enabling control signal - Google Patents
Circuit system for detecting dual-threshold enabling control signal Download PDFInfo
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- CN211506289U CN211506289U CN202020509844.XU CN202020509844U CN211506289U CN 211506289 U CN211506289 U CN 211506289U CN 202020509844 U CN202020509844 U CN 202020509844U CN 211506289 U CN211506289 U CN 211506289U
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Abstract
The utility model discloses a circuit system for detecting dual threshold enables control signal, include: the circuit comprises a current generation module, a resistance network module, a reference voltage module and a threshold comparator; the current generation module is connected with an input power supply and a ground pole, the resistance network module is connected with the current generation module and an enabling control signal source, and the threshold comparator is connected with the reference voltage module and the current generation module. The utility model discloses a current generation module and resistance network module convert the voltage difference that enables control signal and be higher than input power supply to lower voltage, through detecting this lower voltage, judge whether enable control signal has crossed the threshold value of settlement. The detection of the dual-threshold enabling control signal can be carried out only by one comparator, and the reference voltage signal input by the comparator is lower than the input power supply voltage, so that the design difficulty of the comparator is reduced. The circuit system has simple structure, reliable performance and low cost.
Description
Technical Field
The utility model relates to a circuit system for detecting enable control signal especially relates to a circuit system for detecting dual threshold enable control signal.
Background
In circuitry, enabling a control signal is a very important control signal. By inputting different enabling control signals, the circuit system can be controlled to be in a standby state or a working state. Common enabling control signal control generally has two application scenarios:
first application scenario: when the enable control signal is higher than a certain threshold Vth1, the circuit system works, and when the enable control signal is lower than the threshold Vth1, the system is in a standby state; the threshold Vth1 may or may not have hysteresis.
Second application scenario: when the enable control signal is higher than a threshold Vth2, the circuitry is in a standby state, and when the enable control signal is lower than the threshold Vth2, the circuitry is in an operating state. The threshold Vth2 may or may not have hysteresis.
The two application scenarios are similar, both having only one threshold, and the threshold may have hysteresis or not, and when the enable control signal crosses the threshold, the state of the system changes.
In addition to the two common application scenarios, there are several different application scenario requirements in the circuitry. One particular application scenario is:
there are two thresholds in the circuit system, set to V (IN) + Vth3 and V (IN) -Vth4, where V (IN) represents the input supply voltage, Vth3 is the floating-up threshold, Vth4 is the floating-down threshold, and Vth3 and Vth4 are both greater than zero. When the enable control signal is higher than the threshold V (IN) + Vth3 or lower than the threshold V (IN) -Vth4, the system is turned on. When the enable control signal is between V (IN) + Vth3 and V (IN) -Vth4, the system is in a standby state. Vth3 may or may not have hysteresis; vth4 may or may not have hysteresis. For the above application scenario, there are two thresholds to be detected by the system, so the circuit design will become complicated.
In the prior art, a circuit system for detecting a bidirectional enable control signal is shown in fig. 1, the circuit system shown in fig. 1 comprises two comparators 102 and 103, a reference module 101 generates two reference voltages, v (in) + Vth3 and v (in) -Vth4 respectively, and sends the two reference voltages to the two comparators 102 and 103 respectively, and the two comparators 102 and 103 both detect an enable control signal EN. The output logic signals ctl1 and ctl2 of the two comparators 102 and 103 enter the logic module 104, and generate the final system control signal ctl3 through specific logic operations.
However, in the process of implementing the technical solution in the embodiment of the present application, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:
(1) since the higher threshold voltage of the enable control signal EN is higher than the input power voltage v (in), the input range of the comparator in the circuit system is required to be higher than the input power voltage v (in), and thus the circuit design of the comparator is complicated.
(2) Because the enable control signal EN has two threshold voltages, two comparators are designed in the conventional circuit system for detecting the bidirectional enable control signal, which undoubtedly increases the production cost of the circuit system.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a circuit system for detecting dual-threshold enabling control signals, and solves the technical problems that two comparators need to be designed, the circuit design is complex and the cost is high in the prior art when the dual-threshold enabling control signals are detected, the detection of the dual-threshold enabling control signals can be realized only by one comparator, the complexity of the design of the whole circuit system is greatly reduced, and the cost of the circuit system is reduced.
The embodiment of the present application provides a circuit system for detecting a dual-threshold enable control signal, including:
the current generation module is used for converting the voltage difference between the enable control signal and the input power supply into proportional current to be output;
the resistance network module is used for converting the proportional current into output voltage and inputting the output voltage to the threshold comparator as an input voltage signal;
the reference voltage module is used for generating a reference voltage signal with a fixed difference value relative to the input power supply voltage and inputting the reference voltage signal into the threshold comparator to serve as a reference signal;
the threshold comparator is used for comparing the input voltage signal with the reference voltage signal and outputting a signal as an enabling control signal of a circuit system;
the current generation module is connected with an input power supply and a ground pole, the resistance network module is connected with the current generation module and an enabling control signal source, and the threshold comparator is connected with the reference voltage module and the current generation module.
Preferably, the current generation module is a current mirror circuit structure connected by low-voltage transistors.
Preferably, the current generation module is a cascode circuit structure formed by connecting high-voltage transistors.
More preferably, the current generation module comprises a first NMOS transistor, a second NMOS transistor, a third NMOS transistor, a first PMOS transistor, and a second PMOS transistor; the first NMOS transistor, the second NMOS transistor and the third NMOS transistor form a group of current mirrors, and the first PMOS transistor and the second PMOS transistor form another group of current mirrors.
Furthermore, the positive electrode of the input power supply is connected with the source electrode of the first PMOS transistor, and the grid electrode and the drain electrode of the first PMOS transistor are electrically connected;
the source electrode of the second PMOS transistor is connected with the resistance network module, and the grid electrode of the second PMOS transistor is connected with the grid electrode of the first PMOS transistor;
the drain electrode of the first NMOS transistor is connected with the drain electrode of the first PMOS transistor, the source electrode of the first NMOS transistor is connected with the ground electrode, and the drain electrode of the first NMOS transistor is connected with the grid electrode of the second NMOS transistor;
the grid electrode and the drain electrode of the second NMOS transistor are electrically connected, the source electrode of the second NMOS transistor is connected with the ground electrode, and the drain electrode of the second NMOS transistor is connected with the drain electrode of the second PMOS transistor;
the grid electrode of the third NMOS transistor is connected with the grid electrode of the second NMOS transistor, the source electrode of the third NMOS transistor is connected with the ground electrode, and the drain electrode of the third NMOS transistor is connected with the resistance network module.
Preferably, the resistor network module includes a first resistor and a second resistor, one end of the first resistor is connected to the enable control signal source, and the other end of the first resistor is connected to the drain of the second PMOS transistor; one end of the second resistor is connected with an enable control signal source, and the other end of the second resistor is connected with the drain electrode of the third NMOS transistor and the input end of the threshold comparator.
Preferably, the resistor network module includes a first resistor and a second resistor, one end of the first resistor is connected to the enable control signal source, the other end of the first resistor is connected to the drain of the second PMOS transistor and one end of the second resistor, and the other end of the second resistor is connected to the drain of the third NMOS transistor and the input end of the threshold comparator.
Preferably, the output terminal of the threshold comparator is an enable control signal output terminal of the circuit system.
When the circuit system for detecting the dual-threshold enable control signal works, the current generation module converts a voltage difference of the enable control signal higher than an input power supply into a proportional current, the proportional current flows through a second resistor connected with the enable control signal, the proportional current is inversely proportional to the second resistor, and the proportional current is proportional to the voltage difference of the enable control signal and a power supply voltage. If the enable control signal is lower than the potential of the input power supply, the proportional current is equal to zero.
A reference voltage signal having a fixed difference with respect to the input power supply voltage is generated by a reference voltage module, and the reference voltage signal is input to a threshold comparator as a reference signal. And judging whether the enabling control signal passes through the established threshold value or not by detecting the voltage at the other end of the second resistor. The voltage at the other end of the second resistor is used as an input signal of the threshold comparator. The output logic signal of the threshold comparator controls the whole circuit system to be in a working or standby state.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. the voltage difference of the enabling control signal higher than an input power supply is converted into lower voltage by adopting a current generation module and a resistance network module, whether the enabling control signal crosses a set threshold value is judged by detecting the lower voltage, and the detection of the dual-threshold enabling control signal can be carried out by only one comparator.
2. The input range of the comparator is reduced, the reference voltage signal input by the comparator is lower than the input power supply voltage, and the design difficulty of the comparator is reduced.
3. In the case where the enable control signal is lower than the input power supply, the enable control signal has no input current, which is a very important characteristic in some applications.
4. The circuit system has simple structure, reliable performance and low cost.
Drawings
FIG. 1 is a schematic diagram of a prior art circuit system for detecting a dual threshold enable control signal;
FIG. 2 is a schematic diagram of circuitry for detecting a dual-threshold enable control signal according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a circuit system for detecting a dual-threshold enable control signal according to a second embodiment of the present application;
fig. 4 is a waveform diagram illustrating the transition and detection of the enable control signal EN to EN2 according to the second embodiment of the present application;
FIG. 5 is a waveform diagram of the output logic signal of the threshold comparator according to the second embodiment of the present application;
fig. 6 is a schematic diagram of a circuit system for detecting a dual-threshold enable control signal according to a third embodiment of the present application.
Detailed Description
The embodiment of the application provides a circuit system for detecting dual-threshold enabling control signals, and solves the technical problems that two comparators need to be designed, the circuit design is complex and the cost is high in the prior art when the dual-threshold enabling control signals are detected, the detection of the dual-threshold enabling control signals can be realized only by one comparator, the complexity of the design of the whole circuit system is greatly reduced, and the cost of the circuit system is reduced.
In order to solve the problem of crosstalk, the technical scheme in the embodiment of the present application has the following general idea:
the voltage difference between the enabling control signal and the input power supply is converted into proportional current to be output through the current generation module, and the output current is converted into voltage through the resistor and is input into the threshold comparator. A reference voltage signal having a fixed difference with respect to the input power supply voltage is generated by a reference voltage module, and the reference voltage signal is input to a threshold comparator as a reference signal. The output signal of the threshold comparator is used as an enabling control signal of the circuit system.
Through the technical scheme, the detection of the dual-threshold enabling control signal can be realized only by one comparator. Meanwhile, the reference voltage signal input by the comparator is lower than the input power supply voltage, so that the circuit design of the comparator is simpler.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example one
Fig. 1 is a schematic diagram of a circuit system for detecting a dual-threshold enable control signal according to a first embodiment of the present disclosure, where the circuit system for detecting a dual-threshold enable control signal includes a current generation module, a resistance network module, a reference voltage module, and a threshold comparator.
The current generation module is used for converting the voltage difference between the enable control signal and the input power supply into proportional current to be output;
the resistance network module is used for converting the proportional current into output voltage and inputting the output voltage into the threshold comparator as an input voltage signal;
the reference voltage module is used for generating a reference voltage signal with a fixed difference value relative to the input power voltage and inputting the reference voltage signal into the threshold comparator to serve as a reference signal;
and the threshold comparator is used for comparing the input voltage signal with the reference voltage signal and outputting a signal as an enabling control signal of the circuit system.
The current generation module is connected with an input power supply IN and a ground electrode VSS, the resistance network module is connected with the current generation module and an enabling control signal source EN, and the threshold comparator is connected with the reference voltage module and the current generation module.
An enabling control signal sent by an enabling control signal source EN passes through the resistance network module and then is input into the current generation module, the positive electrode of the input power IN is also connected with the current generation module, the current generation module converts the voltage difference between the enabling control signal and the input power into proportional current to be output, and the output current is converted into output voltage through the resistance network module and then is input into the threshold comparator.
A reference voltage signal V (IN) -Vth with a fixed difference Vth relative to an input power supply voltage V (IN) is generated by a reference voltage module, and the reference voltage signal V (IN) -Vth is input to a threshold comparator as a reference signal.
And the threshold comparator compares the high and low of the two input signals and generates a logic signal ctl, and an output signal of the threshold comparator is used as an enabling control signal of the circuit system to control the system to be in a working state or a standby state.
Example two
Fig. 2 is a schematic diagram of a circuit system for detecting a dual-threshold enable control signal according to a second embodiment of the present disclosure, where the circuit system for detecting a dual-threshold enable control signal is composed of a current generation module 201, a reference voltage module 202, a threshold comparator 203, a resistance network module 204, and the like.
The current generation module 201 is composed of a plurality of PMOS transistors and NMOS transistors, the first NMOS transistor M1, the second NMOS transistor M2, and the third NMOS transistor M3 form a set of current mirrors, and the first PMOS transistor M4 and the second PMOS transistor M5 form another set of current mirrors.
Specifically, the positive electrode of the input power supply IN is connected to the source of the first PMOS transistor M4, and the gate and the drain of the first PMOS transistor M4 are electrically connected;
the source of the second PMOS transistor M5 is connected to the resistor network module 204, and the gate of the second PMOS transistor M5 is connected to the gate of the first PMOS transistor M4;
the drain of the first NMOS transistor M1 is connected to the drain of the first PMOS transistor M4, the source of the first NMOS transistor M1 is connected to ground VSS, and the drain of the first NMOS transistor M1 is connected to the gate of the second NMOS transistor M2;
the gate and the drain of the second NMOS transistor M2 are electrically connected, the source of the second NMOS transistor M2 is connected to the ground VSS, and the drain of the second NMOS transistor M2 is connected to the drain of the second PMOS transistor M5;
the gate of the third NMOS transistor M3 is connected to the gate of the second NMOS transistor M2, the source of the third NMOS transistor M3 is connected to ground VSS, and the drain of the third NMOS transistor M3 is connected to the resistor network module 204.
The resistor network module 204 is composed of a first resistor R1 and a second resistor R2. One end of the first resistor R1 is connected to the enable control signal source EN, and the other end IN2 of the first resistor R1 is connected to the drain of the second PMOS transistor M5. One end of the second resistor R2 is connected to the enable control signal source EN, and the other end EN2 of the second resistor R2 is connected to the drain of the third NMOS transistor M3 and the input terminal of the threshold comparator 203.
The input of the reference voltage block 202 is also connected to the input of the threshold comparator 203, and the output signal ctl of the threshold comparator 203 is used as the enable control signal of the circuitry.
In this embodiment, EN represents the enable control signal, and v (EN) represents the voltage value of the enable control signal. The input supply voltage is denoted by IN and by V (IN). The voltage difference between the enable control signal and the input power is represented by V (EN, IN), and the voltage difference between the input power and the enable control signal is represented by V (IN, EN), there are:
V(EN,IN)＝V(EN)-V(IN)，V(IN,EN)＝V(IN)-V(EN)。
the current flowing through the first resistor R1 is denoted by I (R1), and the current flowing through the second resistor R2 is denoted by I (R2).
When V (EN, IN) >0, a current I (R2) is generated through the first resistor R1 and the current generation module 201, the current I (R2) is proportional to V (EN, IN), and the current I (R2) is simultaneously inversely proportional to the second resistor R1, i.e. the current I (R2) is inversely proportional to V (EN, IN) >0
I(R2)＝K1*V(EN,IN)/R1，
Where K1 is a fixed coefficient, and K1 is determined by the width-to-length ratio of some transistors inside the current generation module 201.
The current I (R2) flows through the second resistor R2 connected to the enable control signal EN, and the voltage drop across the second resistor R2 is equal to K1 × V (EN, IN) × R2/R1.
One end of the resistor R2 is connected to the enable control signal EN, the other end of the resistor R2 is represented by EN2, the voltage at the other end of the resistor R2 is represented by V (EN2), and the voltage difference between the input power and the other end of the resistor R2 is represented by V (IN, EN2), so that the voltage difference is present
V(EN2)＝V(EN)-K1*V(EN,IN)*R2/R1，
V(IN,EN2)＝V(IN)-V(EN)+K1*V(EN,IN)*R2/R1
＝(K1*R2/R1-1)*V(EN,IN)，
It can be seen that V (IN, EN2) is proportional to V (EN, IN). Assuming that Vth0 is the floating threshold, if V (EN) is detected to be higher than V (IN) and Vth0, the objective is achieved by detecting the condition that V (EN2) is lower than V (IN) -Vth3 (K1R 2/R1-1), and V (EN2) detection requires a simpler circuit than direct detection of V (EN).
At V (EN, IN) <0, the current I (R2) is equal to zero, and the voltage drop across the second resistor R2 is also equal to zero, since one end of the second resistor R2 is connected to the enable control signal source EN and the other end is denoted by EN2, so V (EN2) ═ V (EN).
In the current generation module 201, the currents I (R2) and I (M2) are in a fixed proportional relationship, and the proportionality coefficient is determined by the width-length proportionality coefficient of the related transistors. In the embodiment of fig. 2, I (R2) ═ I (R1) × W (M3)/L (M3)/W (M2)/L (M2). I () represents the current flowing through the component, W () represents the width of the component, and L () represents the length of the component.
The input bias current I (M2) ═ I (M5) ═ I (R1), I (M1) ═ I (M4) in the NMOS current mirror, and the gate-source voltage of the first PMOS transistor M4 controls the gate voltage of the second PMOS transistor M5. Thus, the first NMOS transistor M1, the second NMOS transistor M2, the first PMOS transistor M4, the second PMOS transistor M5, and the first resistor R1 form a negative feedback loop, which generates a current I (R1),
if V (EN, IN) >0V, I (M2) ═ I (M5) ═ I (R1) ═ V (EN, IN)/R1;
if V (EN, IN) <0V, I (M2) ═ I (M5) ═ I (R1) ═ 0.
That is, the current generation module 201 converts the voltage difference V (EN, IN) of the enable control signal EN higher than the input power IN into the current I (R2), I (R2) flows through a second resistor R2 connected to the enable signal, I (R2) is inversely proportional to the second resistor R1, and I (R2) is proportional to the voltage difference V (EN, IN) of the enable control signal and the power voltage. If the enable control signal EN is lower than the potential of the input power IN, I (R2) is equal to zero.
A reference voltage signal V (IN) -Vth with a fixed difference Vth relative to an input power supply voltage V (IN) is generated by a reference voltage module, and the reference voltage signal V (IN) -Vth is input to a threshold comparator as a reference signal.
The output signal ctl of the threshold comparator serves as an enable control signal for the circuitry.
Fig. 4 shows the potential of EN2 versus the potential of EN in fig. 2. When the EN potential is lower than the IN potential, EN2 is equal to the potential of EN; when the EN potential is higher than the power supply IN potential, V (IN, EN2) and V (EN, IN) keep a proportional relation, and whether EN crosses the established threshold value is judged by detecting EN 2. EN2 is used as an input signal of the threshold comparator 203, and the output logic signal of the threshold comparator 203 controls the whole circuit system to be in an active or standby state, as shown in fig. 5.
The application occasion of the embodiment is used for detecting the control of the dual-threshold enabling control signal, namely V (EN, IN) > Vth0 or V (IN, EN) > Vth, and by the method, the application requirement of the dual-threshold enabling control signal EN can be met by indirectly detecting the potential of EN 2.
By adopting the above technical solution, the present embodiment improves the conventional detection circuit for enabling the control signal. IN this embodiment, only one comparator is required to determine the potential of EN2, so that the detection of the enable control signal EN can be completed, and the input range of the comparator does not need to be higher than the potential of the input power IN.
EXAMPLE III
Fig. 6 is a schematic diagram of a circuit system for detecting a dual-threshold enable control signal according to a third embodiment of the present application, which is substantially the same as the second embodiment except that the structure of the resistor network module 204 is different.
In this embodiment, the resistor network module 204 is composed of a first resistor R1 and a second resistor R2. One end of the first resistor R1 is connected to the enable control signal source EN, and the other end IN2 of the first resistor R1 is connected to the drain of the second PMOS transistor M5. One end of the second resistor R2 is connected to the other end IN2 of the first resistor R1, and the other end EN2 of the second resistor R2 is connected to the drain of the third NMOS transistor M3 and the input terminal of the threshold comparator 203.
IN this embodiment, one end of the second resistor R2 is connected to the other end IN2 of the first resistor R1, so as to reduce the resistance values of the first resistor R1 and the second resistor R2, thereby reducing the number of resistor elements and the occupied chip area of the first resistor R1 and the second resistor R2, and achieving better matching effect and cost advantage.
In this embodiment, the resistance values of the first resistor R1 and the second resistor R2 are reduced by half compared with the second embodiment.
It should be noted that the current generating module 201 may be formed by a low voltage transistor, or may be formed by a high voltage transistor in a cascode circuit structure to adapt to a higher power voltage. The circuit of the current generating module 201 can be implemented IN various ways, and its main feature outputs a current to the second resistor R2, the current is proportional to V (EN, IN), and the current is inversely proportional to R1. When V (EN, IN) <0, the output current is equal to zero.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be termed a second element, and, similarly, a second element may be termed a first element, without departing from the scope of example embodiments.
While the foregoing is directed to the preferred embodiment of the present application, and not to the limiting thereof in any way and any way, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. For example, in order to meet the requirement of higher voltage, the transistors in the current generating module may be low-voltage transistors, high-voltage transistors, or a cascade (cascode) structure to meet the higher power voltage. Those skilled in the art can make various changes, modifications and equivalent arrangements to those skilled in the art without departing from the spirit and scope of the present application; moreover, any equivalent alterations, modifications and variations of the above-described embodiments according to the spirit and techniques of this application are intended to be within the scope of the claims of this application.
Claims (8)
1. Circuitry for detecting a dual-threshold enable control signal, comprising:
a current generation module (201) for converting a voltage difference between the enable control signal and the input power supply into a proportional current output;
a resistance network module (204) for converting the proportional current to an output voltage and inputting to a threshold comparator (203) as an input voltage signal;
a reference voltage module (202) for generating a reference voltage signal having a fixed difference with respect to an input power supply voltage and inputting the reference voltage signal to a threshold comparator (203) as a reference signal;
a threshold comparator (203) for comparing the magnitude of the input voltage signal with the reference voltage signal and outputting a signal as an enable control signal of the circuitry;
the current generation module (201) is connected with an input power supply (IN) and a ground electrode (VSS), the resistance network module (204) is connected with the current generation module (201) and an enabling control signal source (EN), and the threshold comparator (203) is connected with the reference voltage module (202) and the current generation module (201).
2. The circuitry for detecting a dual-threshold enable control signal of claim 1, wherein the current generation module (201) is a current mirror circuit structure connected by low voltage transistors.
3. The circuitry for detecting a dual-threshold enable control signal of claim 1, wherein the current generation module (201) is a cascode circuit structure connected by high voltage transistors.
4. The circuitry for detecting dual threshold enable control signals of claim 2, wherein the current generation module (201) comprises a first NMOS transistor (M1), a second NMOS transistor (M2), a third NMOS transistor (M3), a first PMOS transistor (M4), and a second PMOS transistor (M5); the first NMOS transistor (M1), the second NMOS transistor (M2), and the third NMOS transistor (M3) constitute one set of current mirrors, and the first PMOS transistor (M4) and the second PMOS transistor (M5) constitute another set of current mirrors.
5. The circuitry for detecting dual-threshold enable control signals according to claim 4, wherein the positive terminal of the input power (IN) is connected to the source of the first PMOS transistor (M4), and the gate and the drain of the first PMOS transistor (M4) are electrically connected;
the source of the second PMOS transistor (M5) is connected with the resistance network module (204), and the gate of the second PMOS transistor (M5) is connected with the gate of the first PMOS transistor (M4);
the drain of the first NMOS transistor (M1) is connected to the drain of the first PMOS transistor (M4), the source of the first NMOS transistor (M1) is connected to ground (VSS), and the drain of the first NMOS transistor (M1) is connected to the gate of the second NMOS transistor (M2);
the gate and the drain of the second NMOS transistor (M2) are electrically connected, the source of the second NMOS transistor (M2) is connected to the ground (VSS), and the drain of the second NMOS transistor (M2) is connected to the drain of the second PMOS transistor (M5);
the gate of the third NMOS transistor (M3) is connected to the gate of the second NMOS transistor (M2), the source of the third NMOS transistor (M3) is connected to ground (VSS), and the drain of the third NMOS transistor (M3) is connected to the resistor network module (204).
6. The circuitry for detecting a dual-threshold enable control signal according to claim 4 or 5, wherein the resistor network module (204) comprises a first resistor (R1) and a second resistor (R2), the first resistor (R1) is connected to the enable control signal source (EN) at one end, and the first resistor (R1) is connected to the drain of the second PMOS transistor (M5) at the other end; one end of the second resistor (R2) is connected with an enable control signal source (EN), and the other end of the second resistor (R2) is connected with the drain electrode of the third NMOS transistor (M3) and the input end of the threshold comparator (203).
7. The circuitry for detecting a dual-threshold enable control signal according to claim 4 or 5, wherein the resistor network module (204) comprises a first resistor (R1) and a second resistor (R2), the first resistor (R1) is connected to the enable control signal source (EN) at one end, the first resistor (R1) is connected to the drain of the second PMOS transistor (M5) and to one end of the second resistor (R2) at the other end, and the second resistor (R2) is connected to the drain of the third NMOS transistor (M3) and to the input of the threshold comparator (203) at the other end.
8. The circuitry for detecting a dual threshold enable control signal of claim 1, wherein the output of the threshold comparator is an enable control signal output of the circuitry.
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Effective date of registration: 20210706 Address after: Room 1939, hatching building, 99 Tuanjie Road, yanchuangyuan, Jiangbei new district, Nanjing, Jiangsu 211800 Patentee after: Jingtong Microelectronics (Nanjing) Co.,Ltd. Address before: Room 603, No.11, Lane 7, Xiushan Road, Xuhui District, Shanghai 200030 Patentee before: Liu Zutao |