JPH0495408A - Semiconductor device - Google Patents
Semiconductor deviceInfo
- Publication number
- JPH0495408A JPH0495408A JP21322290A JP21322290A JPH0495408A JP H0495408 A JPH0495408 A JP H0495408A JP 21322290 A JP21322290 A JP 21322290A JP 21322290 A JP21322290 A JP 21322290A JP H0495408 A JPH0495408 A JP H0495408A
- Authority
- JP
- Japan
- Prior art keywords
- constant current
- operational amplifier
- stage
- current source
- differential
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 20
- 230000003321 amplification Effects 0.000 description 9
- 238000003199 nucleic acid amplification method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Amplifiers (AREA)
Abstract
Description
本発明は、オペアンプを内蔵した半導体装置に関する。 The present invention relates to a semiconductor device incorporating an operational amplifier.
従来の半導体装置に於けるオペアンプはＣＭ○Ｓで構成
した場合第２図のような構成をしている。
第２図に於て２０１は差動段に電流を供給する差動増幅
段定電流源であり、２０２はオペアンプ差動増幅段、２
０３はオペアンプ出力段、２０４は非反転入力、２０５
は反転入力、２０６はオペアンプの出力である。非反転
入力２０４からの入力と反転入力２０５からの入力の差
を増幅して２０６の出力端子から出力している。
このオペアンプの差動段の消費電流と応答速度は２０１
の差動増幅段定電流源によって供給される電流によって
決まる。この電流を低く抑えることにより低消費電力が
実現され、消費１を流を大きくすることによりオペアン
プの応答速度が向上する。An operational amplifier in a conventional semiconductor device has a configuration as shown in FIG. 2 when it is composed of CM○S. In FIG. 2, 201 is a differential amplification stage constant current source that supplies current to the differential stage, 202 is an operational amplifier differential amplification stage, and 202 is an operational amplifier differential amplification stage;
03 is the operational amplifier output stage, 204 is the non-inverting input, 205
is an inverting input, and 206 is an output of the operational amplifier. The difference between the input from the non-inverting input 204 and the input from the inverting input 205 is amplified and output from the output terminal 206. The current consumption and response speed of the differential stage of this operational amplifier are 201
The differential amplifier stage is determined by the current supplied by the constant current source. By keeping this current low, low power consumption is achieved, and by increasing the current consumption 1, the response speed of the operational amplifier is improved.
オペアンプはその消費電力を抑える方法として差動段へ
の電流を小さくする必要があるが、小さくすることによ
りオペアンプの応答速度が低下してしまうといった不具
合が生じる。特にアプリケーションとしてオペアンプを
取り込んだ汎用の半導体装置の場合、その半導体装置の
使用される状況により、高速応答性よりも低消費電力が
要求される場合や、逆に低消費電力よりも高速応答性を
要求される場合等がある。このとき、半導体装置に取り
込んだオペアンプの特性が高速に不向きであったり、低
消費電流に不向きであったりするために、その半導体装
置の汎用性が低下してしまうことにっていた。In order to reduce the power consumption of an operational amplifier, it is necessary to reduce the current flowing to the differential stage, but reducing the current reduces the response speed of the operational amplifier. In particular, in the case of a general-purpose semiconductor device that incorporates an operational amplifier as an application, depending on the situation in which the semiconductor device is used, low power consumption may be required over high-speed response, or conversely, high-speed response may be required over low power consumption. There are cases where this is required. At this time, the characteristics of the operational amplifier incorporated into the semiconductor device are unsuitable for high speed or low current consumption, resulting in a reduction in the versatility of the semiconductor device.
本発明のオペアンプを内蔵する半導体装置に於て、前記
オペアンプの差動段の消費電流を設定するための複数の
定電流源と、前記複数の定電流源の中から任意に定電流
源を選択可能とするための定電流源選択回路とを、一つ
の半導体装置内に備えたことを特徴とする。In a semiconductor device incorporating an operational amplifier according to the present invention, a plurality of constant current sources are provided for setting the current consumption of the differential stage of the operational amplifier, and a constant current source is arbitrarily selected from among the plurality of constant current sources. The present invention is characterized in that a constant current source selection circuit for making this possible is provided in one semiconductor device.
以上のように構成されたオペアンプを内蔵した半導体装
置は、オペアンプに供給される電流を数段階に切り換え
ることが可能であることにより、低消費電力向けのオペ
アンプの設定や応答速度を向上させた設定など、一つの
半導体装置上でその半導体装置のアプリケーションに合
わせたオペアンプの特性が設定できるようになる。Semiconductor devices with built-in operational amplifiers configured as described above can switch the current supplied to the operational amplifiers into several stages, allowing operational amplifier settings for low power consumption and settings that improve response speed. It is now possible to set the characteristics of an operational amplifier on a single semiconductor device to match the application of that semiconductor device.
本発明によるオペアンプを内蔵した半導体装置の１実施
令を第１図に示す。１０１はオペアンプの差動段、１０
２．１０３は差動段の消費電流を設定するための定電流
源を選択するための定電流源選択信号、１０４．１０５
は定電流源への電流の供給を選択するためのＰＭＯＳス
イッチ、１０６．１０７は差動段への電流を供給する差
動段定電流源。１０８は非反転入力１０９、反転入力１
１０の電圧差を増幅するオペアンプ差動増幅段、１］１
．１１２は１０６．１０７の定電流源を選択するための
信号を保持するための定電流源選択レジスタ、１１３は
差動段からの出力を外部に圧力するオペアンプ出力段、
１１４は出力段の消費電流を設定するための出力段定電
流源、１１５はオペアンプの出力である。
１１１及び１１２の定電流源選択レジスタに″１パを書
き込むことにより差動段での消費電流を選択することが
できる。この回路例では、１０４のＰＭＯ３定電流源ス
イッチ１のみＯＮ、または１０５のＰＭＯＳ定電流源ス
イッチ２のみＯＮ、１０４．１０５両方のＰＭＯＳスイ
ッチＯＮの３段階の差動段への電流量を設定することが
できる。
これにより、オペアンプの応答速度も３段階に切り換え
ることができるようになり、オペアンプの使用される状
況に最適なオペアンプの能力を設定することができるよ
うになる。
またオペアンプを動作させない場合には１１１．１１２
のレジスタ両方に”０”を書き込むことにより差動段へ
の電流供給を切ることができ、消費電力を低く抑えるこ
とができる。
［発明の効果］
以上述べたように本発明によれば、オペアンプに流れる
ｌｉ流を数段階に設定することが可能となり、オペアン
プの使用されるアプリケーションにより、オペアンプの
能力を切り換えることが可能となる。これにより、低消
費電流を犠牲にしても高速応答性が必要なアプリケーシ
ョンや、高速応答性は必要ではないが低消費電力である
ことが必要であるといったアプリケーションにも同一の
半導体装置によって対応することができるようになる。
また、消費電流を小さく抑えたオペアンプの場合ノイズ
に対して弱くなるといった問題があるが、本発明の半導
体装置により、差動段への電流量を増加させることによ
り、対ノイズ性を向上させることができる。FIG. 1 shows one implementation example of a semiconductor device incorporating an operational amplifier according to the present invention. 101 is the differential stage of the operational amplifier, 10
2.103 is a constant current source selection signal for selecting a constant current source for setting the current consumption of the differential stage, 104.105
106 and 107 are differential stage constant current sources that supply current to the differential stage. 108 is non-inverting input 109, inverting input 1
Operational amplifier differential amplification stage that amplifies the voltage difference of 1]1
．． 112 is a constant current source selection register for holding a signal for selecting the constant current source of 106 and 107; 113 is an operational amplifier output stage that presses the output from the differential stage to the outside;
114 is an output stage constant current source for setting the current consumption of the output stage, and 115 is the output of the operational amplifier. The current consumption in the differential stage can be selected by writing "1P" to the constant current source selection registers 111 and 112. In this circuit example, only the PMO3 constant current source switch 1 of 104 is ON, or the constant current source switch 1 of 105 is ON. The amount of current to the differential stage can be set in three stages: only PMOS constant current source switch 2 is ON, and both PMOS switches 104 and 105 are ON.This also allows the response speed of the operational amplifier to be switched to three stages. This makes it possible to set the optimal operational amplifier capacity for the situation in which the operational amplifier is used.Also, when the operational amplifier is not operated, 111.112
By writing "0" to both registers, the current supply to the differential stage can be cut off, and power consumption can be kept low. [Effects of the Invention] As described above, according to the present invention, it is possible to set the li current flowing to the operational amplifier in several stages, and it is possible to switch the capability of the operational amplifier depending on the application in which the operational amplifier is used. . This makes it possible to use the same semiconductor device to support applications that require high-speed response at the expense of low current consumption, and applications that do not require high-speed response but require low power consumption. You will be able to do this. Additionally, operational amplifiers with low current consumption have the problem of being susceptible to noise, but the semiconductor device of the present invention can improve noise resistance by increasing the amount of current flowing to the differential stage. I can do it.
第１図は本発明によるオペアンプの１実施例を示す回路
図である。
第２図は従来のオペアンプの実施例を示すための回路図
である。
１０１・・・オペアンプの差動段
１０２・・・定電流源選択信号１
１０３・・・定電流源選択信号２
１０４・・・Ｐ Ｍ○Ｓトランジスタによる定電流源ス
イッチ１
１０５・・・ＰＭＯＳトランジスタによる定電流源スイ
ッチ２
１０６・・・差動増幅段定電流源１
１０７・・・差動増幅段定電流源２
１０Ｂ・・・オペアンプ差動増幅段
１０９・・・非反転入力
１１０・・・反転入力
１１１・・・定電流源選択レジスタ
１１２・・・定電流源選択レジスタ
１１３・・・オペアンプ出力段
１１４・・・出力段定電流源
１１５・・・オペアンプ出力
２０１・・・差動増幅段定電流源
２０２・・・オペアンプ差動増幅段
２０３・・・オペアンプ出力段
２０４・・・非反転入力
２０５・・・反転入力
２０６・・・オペアンプ出力
以上
出願人セイコーエプソン株式会社
代理人弁理土鈴木喜三部（他１名）FIG. 1 is a circuit diagram showing one embodiment of an operational amplifier according to the present invention. FIG. 2 is a circuit diagram showing an embodiment of a conventional operational amplifier. 101... Differential stage of operational amplifier 102... Constant current source selection signal 1 103... Constant current source selection signal 2 104... Constant current source switch 1 using P M○S transistor 105... PMOS transistor Constant current source switch 2 106...differential amplification stage constant current source 1 107...differential amplification stage constant current source 2 10B...operational amplifier differential amplification stage 109...non-inverting input 110... Inverting input 111... Constant current source selection register 112... Constant current source selection register 113... Operational amplifier output stage 114... Output stage Constant current source 115... Operational amplifier output 201... Differential amplification stage Constant current source 202... Operational amplifier differential amplification stage 203... Operational amplifier output stage 204... Non-inverting input 205... Inverting input 206... Operational amplifier output or more Applicant Seiko Epson Corporation Attorney Tsuchi Suzuki Kisanbe (1 other person)
Claims (1)
プの差動段の消費電流を設定するための複数の定電流源
と、前記複数の定電流源の中から任意に定電流源を選択
可能とするための定電流源選択回路とを、一つの半導体
装置内に備えたことを特徴とする半導体装置。In a semiconductor device incorporating an operational amplifier, a plurality of constant current sources are provided for setting the current consumption of a differential stage of the operational amplifier, and a constant current source can be arbitrarily selected from among the plurality of constant current sources. What is claimed is: 1. A semiconductor device comprising a constant current source selection circuit for selecting a constant current source in one semiconductor device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21322290A JPH0495408A (en) | 1990-08-10 | 1990-08-10 | Semiconductor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21322290A JPH0495408A (en) | 1990-08-10 | 1990-08-10 | Semiconductor device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0495408A true JPH0495408A (en) | 1992-03-27 |
Family
ID=16635559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21322290A Pending JPH0495408A (en) | 1990-08-10 | 1990-08-10 | Semiconductor device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0495408A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6854067B1 (en) | 2000-10-30 | 2005-02-08 | Cypress Semiconductor Corporation | Method and system for interaction between a processor and a power on reset circuit to dynamically control power states in a microcontroller |
| JP2011211443A (en) * | 2010-03-29 | 2011-10-20 | Seiko Instruments Inc | Differential amplifier circuit |
| US8149048B1 (en) * | 2000-10-26 | 2012-04-03 | Cypress Semiconductor Corporation | Apparatus and method for programmable power management in a programmable analog circuit block |
| US8358150B1 (en) | 2000-10-26 | 2013-01-22 | Cypress Semiconductor Corporation | Programmable microcontroller architecture(mixed analog/digital) |
| US8370791B2 (en) | 2001-11-19 | 2013-02-05 | Cypress Semiconductor Corporation | System and method for performing next placements and pruning of disallowed placements for programming an integrated circuit |
| US9766650B2 (en) | 2000-10-26 | 2017-09-19 | Cypress Semiconductor Corporation | Microcontroller programmable system on a chip with programmable interconnect |
| US10466980B2 (en) | 2001-10-24 | 2019-11-05 | Cypress Semiconductor Corporation | Techniques for generating microcontroller configuration information |
| US10698662B2 (en) | 2001-11-15 | 2020-06-30 | Cypress Semiconductor Corporation | System providing automatic source code generation for personalization and parameterization of user modules |
| JP2021148800A (en) * | 2020-03-23 | 2021-09-27 | アナログ ディヴァイスィズ インク | Comparator with configurable operating mode |
-
1990
- 1990-08-10 JP JP21322290A patent/JPH0495408A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9843327B1 (en) | 2000-10-26 | 2017-12-12 | Cypress Semiconductor Corporation | PSOC architecture |
| US8149048B1 (en) * | 2000-10-26 | 2012-04-03 | Cypress Semiconductor Corporation | Apparatus and method for programmable power management in a programmable analog circuit block |
| US8358150B1 (en) | 2000-10-26 | 2013-01-22 | Cypress Semiconductor Corporation | Programmable microcontroller architecture(mixed analog/digital) |
| US9766650B2 (en) | 2000-10-26 | 2017-09-19 | Cypress Semiconductor Corporation | Microcontroller programmable system on a chip with programmable interconnect |
| US10020810B2 (en) | 2000-10-26 | 2018-07-10 | Cypress Semiconductor Corporation | PSoC architecture |
| US10248604B2 (en) | 2000-10-26 | 2019-04-02 | Cypress Semiconductor Corporation | Microcontroller programmable system on a chip |
| US10725954B2 (en) | 2000-10-26 | 2020-07-28 | Monterey Research, Llc | Microcontroller programmable system on a chip |
| US6854067B1 (en) | 2000-10-30 | 2005-02-08 | Cypress Semiconductor Corporation | Method and system for interaction between a processor and a power on reset circuit to dynamically control power states in a microcontroller |
| US10466980B2 (en) | 2001-10-24 | 2019-11-05 | Cypress Semiconductor Corporation | Techniques for generating microcontroller configuration information |
| US10698662B2 (en) | 2001-11-15 | 2020-06-30 | Cypress Semiconductor Corporation | System providing automatic source code generation for personalization and parameterization of user modules |
| US8370791B2 (en) | 2001-11-19 | 2013-02-05 | Cypress Semiconductor Corporation | System and method for performing next placements and pruning of disallowed placements for programming an integrated circuit |
| JP2011211443A (en) * | 2010-03-29 | 2011-10-20 | Seiko Instruments Inc | Differential amplifier circuit |
| JP2021148800A (en) * | 2020-03-23 | 2021-09-27 | アナログ ディヴァイスィズ インク | Comparator with configurable operating mode |
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