JP2013531938A - 広いコモンモード入力範囲を有する差動比較回路 - Google Patents
広いコモンモード入力範囲を有する差動比較回路 Download PDFInfo
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- JP2013531938A JP2013531938A JP2013512650A JP2013512650A JP2013531938A JP 2013531938 A JP2013531938 A JP 2013531938A JP 2013512650 A JP2013512650 A JP 2013512650A JP 2013512650 A JP2013512650 A JP 2013512650A JP 2013531938 A JP2013531938 A JP 2013531938A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/22—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
- H03K5/24—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 the characteristic being amplitude
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/22—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
- H03K5/24—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 the characteristic being amplitude
- H03K5/2472—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 the characteristic being amplitude using field effect transistors
- H03K5/2481—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 the characteristic being amplitude using field effect transistors with at least one differential stage
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
- H03F3/45071—Differential amplifiers with semiconductor devices only
- H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
- H03F3/45179—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
- H03F3/4521—Complementary long tailed pairs having parallel inputs and being supplied in parallel
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- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Manipulation Of Pulses (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
Description
実施の形態は、一般に、トランジスタ増幅に関し、より特定的には、差動比較器に関する。
差動比較器は、入力を受けてこれらの間の差を測定する回路である。典型的な差動比較器は、2つの入力を取得し、いずれの信号が高いかを示す信号を返す。アナログ/デジタルコンバータ(analog to digital converters:ADC)または送受信回路などの多くの回路は、差動比較器を用いる。
相補型差動対増幅器(差動対と略す)は、差動比較動作の実行によく用いられる。典型的な相補型差動対のゲインは、コモンモード電圧の範囲にわたって用いられるとき、50パーセントまで変化することができる。その結果、ゲインは、使用されるコモンモードに従って調整されなければならない。しかしながら、このゲイン調整は、差動比較器の出力の線形性に影響を与えるため望ましくない。1つ以上の実施の形態は、広いコモンモード入力範囲にわたる動作が可能な略線形な差動比較器のための方法および回路を提供する。
Claims (15)
- 並列に結合され、少なくとも第1の差動増幅器および第2の差動増幅器を含む複数の差動増幅器を備え、
差動増幅器の各々は、前記差動増幅器に流れるテール電流を制限するように結合される調整可能な電流制御回路を含む、回路配置。 - 前記調整可能な電流制御回路へ結合されるゲイン制御回路をさらに備え、
前記ゲイン制御回路は、トリム制御信号に応答して前記調整可能な電流制御回路に流れる電流を調整するように構成される、請求項1に記載の回路配置。 - 前記ゲイン制御回路は、前記テール電流が増加していることを示す前記トリム制御信号に応答して、1つ以上の前記調整可能な電流制御回路を調整してそれぞれの前記差動増幅器に流れる前記テール電流を増加させるようにさらに構成され、
前記ゲイン制御回路は、前記テール電流が低減していることを示す前記トリム制御信号に応答して、1つ以上の前記調整可能な電流制御回路を調整してそれぞれの前記差動増幅器に流れる前記テール電流を低減させるようにさらに構成される、請求項2に記載の回路配置。 - 前記調整可能な電流制御回路は、全オン、全オフ、および一部オンからなるディスクリートな状態の組のうちの1つの状態において動作するように構成され、
前記調整可能な電流制御回路は、前記複数のそれぞれの電流制御回路のうちの1つのみが前記一部オン状態で所定の時間に動作するように調整される、請求項2または3に記載の回路配置。 - 前記調整可能な電流制御回路は、前記一部オン状態において動作している間に複数のディスクリートな電流レベルへ調整可能である、請求項4に記載の回路配置。
- 前記複数の差動増幅器の差動増幅器の各々は、2つの相補型差動トランジスタ対を含む、請求項1〜5のいずれか1項に記載の回路配置。
- 前記複数の差動増幅器の前記差動トランジスタ対の各々の第1および第2の電流出力へ結合される電流積算回路をさらに備える、請求項1〜6のいずれか1項に記載の回路配置。
- 前記調整可能な電流制御回路は、調整可能な電流源である、請求項1〜7のいずれか1項に記載の回路配置。
- 前記調整可能な電流制御回路は、MOSFETトランジスタである、請求項1〜7のいずれか1項に記載の回路配置。
- 前記MOSFETトランジスタのゲート寸法は、実質的に同一である、請求項9に記載の回路配置。
- 差動増幅器の各々における相補型差動トランジスタ対のゲート寸法は、実質的に同一である、請求項6に記載の回路配置。
- 並列に結合された複数の差動増幅器によってコモンモード入力を受信するステップと、
前記コモンモード入力に基づいて線形に変化する前記複数の差動増幅器に流れる複数のテール電流を生成するステップと、
トリム制御信号に応答して、前記複数のテール電流を制限するステップとを含む方法。 - 前記複数のテール電流を制限するステップは、前記複数の差動増幅器の特定の1つに流れる電流を制限するトランジスタのバイアスゲート電圧を調整するステップを含む、請求項12に記載の方法。
- 前記バイアスゲート電圧を調整するステップは、特定の数の1倍の電流ユニットを有効にするステップを含み、
ゲイン制御ロジックからの前記トリム制御信号は、有効にされた前記特定の数の1倍の制御ユニットを規定する、請求項13に記載の方法。 - 前記複数のテール電流を制限するステップは、前記複数のテール電流のうちの1つのみが一部オン状態で所定の時間に動作するように、テール電流の各々が全オン、全オフ、および一部オンを含むディスクリートな状態の組のうちの1つの状態になるように調整するステップを含む、請求項12〜14のいずれか1項に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/790,425 | 2010-05-28 | ||
US12/790,425 US9178503B2 (en) | 2010-05-28 | 2010-05-28 | Differential comparator circuit having a wide common mode input range |
PCT/US2011/036540 WO2011149691A1 (en) | 2010-05-28 | 2011-05-13 | Differential comparator circuit having a wide common mode input range |
Publications (2)
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JP2013531938A true JP2013531938A (ja) | 2013-08-08 |
JP5563154B2 JP5563154B2 (ja) | 2014-07-30 |
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US (1) | US9178503B2 (ja) |
EP (1) | EP2577866B1 (ja) |
JP (1) | JP5563154B2 (ja) |
KR (1) | KR101467658B1 (ja) |
CN (1) | CN103026624B (ja) |
WO (1) | WO2011149691A1 (ja) |
Cited By (1)
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CN103026624A (zh) | 2013-04-03 |
CN103026624B (zh) | 2016-04-13 |
KR20130020696A (ko) | 2013-02-27 |
KR101467658B1 (ko) | 2014-12-01 |
US20110291758A1 (en) | 2011-12-01 |
JP5563154B2 (ja) | 2014-07-30 |
EP2577866B1 (en) | 2017-09-13 |
WO2011149691A1 (en) | 2011-12-01 |
EP2577866A1 (en) | 2013-04-10 |
US9178503B2 (en) | 2015-11-03 |
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