# US 2023/0408557 A1 · Voltage detection circuit and voltage detection method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0408557 A1 - Document ID: US20230408557A1 - Status: Published application - Kind: A1 - Application number: 18/186,945 - Filed: 2023-03-20 - Published: 2023-12-21 - Earliest claimed: 2022-06-17 - Assignees: Changxin Memory Technologies, Inc. - Applicants: Changxin Memory Technologies, Inc. - Inventors: Anping QIU - Web page: https://patentgrep.com/patent/US20230408557A1 ## CPC - G01R 19/16576: {comparing DC or AC voltage with one threshold (G01R19/16514, G01R19/16519, G01R19/16528, G01R19/16533 and G01R19/1659 take precedence)} - G01R 19/00: Arrangements for measuring currents or voltages or for indicating presence or sign thereof (G01R5/00 takes precedence; for measuring bioelectric currents or voltages A61B5/24) - H03K 5/22: Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral (indicating phase difference of two cyclic pulse trains G01R25/00) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) ## Abstract A voltage detection circuit including a threshold setting module and a voltage conversion module, and a voltage detection method are provided. In the threshold setting module, a first input end is configured to receive a voltage to be detected, a second input end is configured to receive a threshold regulation signal, a power supply end is connected to a first voltage and is configured to set a voltage regulation range according to the threshold regulation signal, determine a first voltage regulation value in the voltage regulation range according to the voltage to be detected, and generate a control voltage according to the first voltage and the first voltage regulation value. The voltage conversion module is configured to output a first level when the control voltage is greater than a preset value and output a second level when the control voltage is less than or equal to the preset value. ## Claims ### Claim 1 A voltage detection circuit, comprising: a threshold setting module having a first input end, a second input end and a power supply end, wherein the first input end is configured to receive a voltage to be detected, the second input end is configured to receive a threshold regulation signal, and the power supply end is connected to a first voltage and is configured to set a voltage regulation range according to the threshold regulation signal, determine a first voltage regulation value in the voltage regulation range according to the voltage to be detected, and generate a control voltage according to the first voltage and the first voltage regulation value; and a voltage conversion module, wherein an input end of the voltage conversion module receives the control voltage through a first node, and is configured to output a first level in response to that the control voltage is greater than a preset value, and output a second level in response to that the control voltage is less than or equal to the preset value. ### Claim 2 (depends on 1) The voltage detection circuit of claim 1, further comprising: a voltage bias module which is connected to the first node and is configured to provide a bias voltage for the input end of the voltage conversion module. ### Claim 3 (depends on 1) The voltage detection circuit of claim 1, wherein the threshold setting module has a plurality of predetermined voltage regulation ranges, and the threshold regulation signal is used to select one voltage regulation range from the plurality of voltage regulation ranges. ### Claim 4 (depends on 3) The voltage detection circuit of claim 3, wherein the threshold setting module comprises a plurality of threshold setting units and a plurality of control units, each of the control units is connected to one or more of the threshold setting units, and each of the control units is configured to enable one or more of the threshold setting units in response to the threshold regulation signal. ### Claim 5 (depends on 4) The voltage detection circuit of claim 4, wherein the voltage regulation ranges corresponding to the plurality of threshold setting units are identical, or the voltage regulation range of at least one threshold setting unit of the plurality of threshold setting units is different from the voltage regulation ranges of the threshold setting units other than the at least one threshold setting unit of the plurality of threshold setting units. ### Claim 6 (depends on 4) The voltage detection circuit of claim 4, wherein each of the control units is connected to one or more of the threshold setting units, and when the number of the control units is greater than one, at least two of the control units are connected to a same threshold setting unit, or different control units are connected to different threshold setting units. ### Claim 7 (depends on 4) The voltage detection circuit of claim 4, wherein the control unit comprises a switch element, a first end of the switch element is connected to a first end of the threshold setting unit corresponding to the control unit, and a second end of the switch element is connected to a second end of the threshold setting unit corresponding to the control unit. ### Claim 8 (depends on 4) The voltage detection circuit of claim 4, wherein a control end of the control unit is configured to receive the threshold regulation signal or an inversion signal of the threshold regulation signal, or the threshold regulation signal comprises a plurality of different threshold regulation sub-signals, the control end of each of the control units corresponds to one of the threshold regulation sub-signals, and different control units are connected to a same threshold regulation sub-signal or different threshold regulation sub-signals. ### Claim 9 (depends on 7) The voltage detection circuit of claim 7, wherein a control end of the control unit is configured to receive the threshold regulation signal or an inversion signal of the threshold regulation signal, or the threshold regulation signal comprises a plurality of different threshold regulation sub-signals, the control end of each of the control units corresponds to one of the threshold regulation sub-signals, and different control units are connected to a same threshold regulation sub-signal or different threshold regulation sub-signals. ### Claim 10 (depends on 4) The voltage detection circuit of claim 4, wherein each of the threshold setting modules comprises one or more transistors connected in series, and the threshold setting module comprises: M transistors connected in series, wherein gates of the M transistors are all coupled to the first input end; a first end of a first transistor in the M transistors is coupled to the power supply end, the second end of the first transistor is connected to a first end of a second transistor in the M transistors, a second end of a M-th transistor in the M transistors is connected to the first node, and a first end of the M-th transistor is connected to a second end of a (M-1)-th transistor in the M transistors, M being greater than or equal to 2. ### Claim 11 (depends on 7) The voltage detection circuit of claim 7, wherein the switch element is implemented by a transistor. ### Claim 12 (depends on 1) The voltage detection circuit of claim 1, wherein the voltage conversion module comprises: a detection unit having a power end, an input end and an output end, wherein the power end is connected to a second voltage, and the input end is connected to the first node, the detection unit is configured to determine a second voltage regulation value according to the control voltage of the first node, and output a detection voltage through the output end according to the second voltage and the second voltage regulation value; and a level conversion unit, wherein an input end of the level conversion unit is connected to the output end of the detection unit, and is configured to output the first level or the second level according to the detection voltage. ### Claim 13 (depends on 12) The voltage detection circuit of claim 12, wherein the detection unit comprises: a first P-type transistor, wherein a gate of the first P-type transistor, as the input end of the voltage conversion module, is connected to the first node, a source of the first P-type transistor is connected to the power end, and a drain of the first P-type transistor is connected to a second node, and the second node is connected to the input end of the level conversion unit; and a first resistance unit, wherein a first end of the first resistance unit is connected to the second node, and the second end is grounded. ### Claim 14 (depends on 12) The voltage detection circuit of claim 12, wherein the level conversion unit comprises an inverter. ### Claim 15 (depends on 13) The voltage detection circuit of claim 13, wherein the level conversion unit comprises an inverter. ### Claim 16 (depends on 2) The voltage detection circuit of claim 2, wherein the voltage bias module comprises: a second P-type transistor, wherein a source of the second P-type transistor is connected to a second voltage, and a gate and a drain of the second P-type transistor are connected to the first node; and a second resistance unit, wherein a first end of the second resistance unit is connected to the first node, and a second end of the second resistance unit is grounded. ### Claim 17 A voltage detection method applied to a voltage detection circuit, comprising: outputting a threshold regulation signal to set a voltage regulation range; determining a first voltage regulation value within the voltage regulation range according to a voltage to be detected; determining a control voltage according to the first voltage regulation value and a first voltage; and detecting the control voltage, outputting a first level in response to that the control voltage is greater than a preset value, and outputting a second level in response to that the control voltage is less than or equal to the preset value. ### Claim 18 (depends on 17) The voltage detection method of claim 17, wherein the detecting the control voltage comprises: determining a second voltage regulation value according to the control voltage; outputting a detection voltage according to the second voltage regulation value and the second voltage; and outputting the first level in response to that the detection voltage is greater than a preset turnover level, and outputting the second level in response to that the detection voltage is less than the preset turnover level.