US 2019/0244672 A1Published application

Semiconductor device

AssigneeRenesas Electronics Corporation

InventorsShota OKAYAMA, Akihiko KANDA

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Abstract

An object of the present invention is to provide a semiconductor device capable of simplifying a trimming operation. A semiconductor device according to an embodiment includes a power supply circuit and a trimming circuit. The power supply circuit includes a reference voltage generation circuit that generates a plurality of reference voltages used at the time of a trimming operation, and a voltage generation circuit that generates a plurality of power supply voltages used by a semiconductor storage device. The semiconductor device adjusts a specific reference voltage using an external reference voltage at the time of the trimming operation, and then determines trimming codes corresponding to the adjustment amounts of the power supply voltages using a plurality of reference voltages generated using the adjusted specific reference voltage and a plurality of power supply voltages corresponding to the reference voltages.

Claims14

Dependent claims

A semiconductor device comprising:

a logic circuit for outputting the first trimming code,
a power supply circuit for generating a specific reference voltage and a plurality of power supply voltages, and
a comparator for comparing an external reference voltage with the specific reference voltage and outputting a first comparison result,
wherein the power supply circuit generates a plurality of reference voltages from the specific reference voltage based on the first comparison result,
wherein the plurality of reference voltages include a first reference voltage,
wherein the plurality of power supply voltages include a first power supply voltage corresponding to the first reference voltage,
wherein the comparator compares each of the plurality of reference voltages with the plurality of power supply voltages corresponding to each of the plurality of reference voltages,
wherein the comparator compares the first power supply voltage trimmed based on the first trimming code with the first reference voltage, and outputs a second comparison result, and
wherein the logic circuit adjusts the first trimming code based on the second result.

6 more elements

A semiconductor device comprising:

a power supply circuit including a reference current source that generates a reference current used at the time of a trimming operation and an operating current source that generates an operating current used by a semiconductor storage device;
the semiconductor storage device including a trimming circuit that trims the operating current at the time of the trimming operation;
and
a control circuit controlling the trimming operation in the semiconductor storage device,
wherein the trimming circuit is configured to be capable of inputting an external reference current from the outside of the semiconductor device, and
wherein the control circuit adjusts the reference current using the external reference current supplied from the outside of the semiconductor device at the time of the trimming operation, and then determines a trimming code corresponding to the adjustment amount of the operating current source used by the semiconductor storage device using the adjusted reference current.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/243,789Filed 9 Jan 2019
Priority: JP 2018-0181855 Feb 2018
Published: 8 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G11C 16/30
Auxiliary circuits, e.g. for writing into memory: power supply circuits
G11C 5/147
Power supply arrangements , e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels: voltage…
G11C 29/021
Detection or location of defective auxiliary circuits, e.g. defective refresh counters: in voltage or current generators
G11C 29/028
Detection or location of defective auxiliary circuits, e.g. defective refresh counters: with adaption or trimming of parameters

Family

US 10,614,895 B2Related patent
US 2019/0244672 A1This patent

From the US filing history. Foreign family members aren’t listed.

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