# US 12,002,520 B2 · Voltage generation circuit which is capable of executing high-speed boost operation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,002,520 B2 - Document ID: US12002520B2 - Status: Granted - Kind: B2 - Application number: 18/349,443 - Filed: 2023-07-10 - Published: 2023-11-02 - Granted: 2024-06-04 - Earliest claimed: 2010-11-01 - Assignees: Kioxia Corporation - Applicants: Kioxia Corporation - Inventors: Tatsuro Midorikawa; Masami Masuda - Web page: https://patentgrep.com/patent/US12002520B2 ## CPC - H02M 3/07: using capacitors charged and discharged alternately by semiconductor devices with control electrode {, e.g. charge pumps} - G11C 16/30: Power supply circuits - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - G11C: STATIC STORES (semiconductor memory devices H10B) ## Abstract According to one embodiment, a voltage generation circuit includes a first boost circuit, a voltage division circuit, a first detection circuit, a capacitor and a first switch. The first boost circuit outputs a first voltage. The voltage division circuit divides the first voltage. The first detection circuit is configured to detect a first monitor voltage supplied to the first input terminal, based on a reference voltage which is supplied to a second input terminal of the first detection circuit, and to control an operation of the first boost circuit. The capacitor is connected between an output terminal of the first boost circuit and the first input terminal of the first detection circuit. The first switch cuts off a connection between the capacitor and the first detection circuit, based on an output signal of the first detection circuit, until the first voltage is output from the first boost circuit. ## Claims ### Claim 1 A voltage generation circuit comprising: a charge pump circuit configured to output a first voltage; a first voltage division circuit configured to divide the first voltage to a second voltage; a second voltage division circuit configured to divide a difference between the first voltage and the second voltage to a third voltage a first amplifier having a first input terminal and a second input terminal, the first amplifier configured to input the second voltage from the first input terminal and to input a fourth voltage from the second input terminal, the first amplifier configured to output a signal which controls the charge pump circuit; a second amplifier having a third input terminal and a fourth input terminal, the second amplifier configured to input the third voltage from the third input terminal and to input the fourth voltage from the fourth input terminal, the second amplifier configured to output a signal which controls a part of the voltage generation circuit; a capacitor having a first end connected to an output terminal of the charge pump circuit and a second end connected to the first input terminal of the first amplifier via a first transistor. ### Claim 2 (depends on 1) The voltage generation circuit according to claim 1, wherein the part of the voltage generation circuit is the first transistor. ### Claim 3 (depends on 1) The voltage generation circuit according to claim 1, wherein the first transistor is connected between the second end of the capacitor and the first input terminal of the first amplifier. ### Claim 4 (depends on 1) The voltage generation circuit according to claim 1, further comprising: a second transistor, a first end of the second transistor connected to the second end of the capacitor and a second end of the second transistor connected to a node supplied with the fourth voltage. ### Claim 5 (depends on 4) The voltage generation circuit according to claim 4, further comprising: a logical circuit, an input terminal of the logical circuit connected to an output terminal of the second amplifier and a second output terminal of the logical circuit connected to a gate of the second transistor. ### Claim 6 (depends on 5) The voltage generation circuit according to claim 5, wherein the second transistor is configured to establish a connection between the capacitor and a node supplied with the fourth voltage, based on an output signal from the second output terminal of the logical circuit, until the first voltage is output from the charge pump circuit. ### Claim 7 (depends on 1) The voltage generation circuit according to claim 1, wherein the first voltage division circuit and the second voltage division circuit includes: a first resistance, a first end of the first resistance connected to the output terminal of the charge pump circuit and a second end of the first resistance connected to the third input terminal of the second amplifier; a second resistance, a first end of the second resistance connected to the second end of the first resistance and a second end of the second resistance connected to the first input terminal of the first amplifier; and a third resistance, a first end of the third resistance connected to the second end of the second resistance and a second end of the third resistance connected to the ground terminal. ### Claim 8 (depends on 1) The voltage generation circuit according to claim 1, further comprising: a logical circuit, an input terminal of the logical circuit connected to an output terminal of the second amplifier and a first output terminal of the logical circuit connected to a gate of the first transistor. ### Claim 9 (depends on 8) The voltage generation circuit according to claim 8, wherein the first transistor is configured to cut off a connection between the capacitor and the first amplifier, based on an output signal from the first output terminal of the logical circuit, until the first voltage is output from the charge pump circuit.