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1. 发明授权

US07091787B2 Transconductance amplifier with temperature sensitive current limiting 有权
标题翻译：具有温度敏感电流限制的跨导放大器
公开(公告)号：US07091787B2
公开(公告)日：2006-08-15
申请号：US10873902
申请日：2004-06-22
申请人： Scott C. Willis
发明人： Scott C. Willis
IPC分类号： H03F3/26
CPC分类号： H03F3/26 , H03F3/3083 , H03F3/3432 , H03F3/45475 , H03F2200/447 , H03F2203/45288
摘要： A transconductance amplifier generally limits its current output, and specifically decreases its current output as a function of temperature. The circuit is made up of an operational amplifier and two drive transistors that are connected to a first part of the amplifier circuit and a second part of the amplifier circuit respectively. The first part of the circuit is driven by positive input voltages, and the second part of the circuit is driven by negative input voltages. A transistor in each part of the circuit clamps a voltage, thereby limiting the current output. The negative temperature coefficient of the transistor also decreases the output current as the temperature of the circuit rises.
摘要翻译：跨导放大器通常限制其电流输出，并且具体地降低其作为温度的函数的电流输出。电路由运算放大器和两个驱动晶体管组成，分别连接到放大器电路的第一部分和放大器电路的第二部分。电路的第一部分由正输入电压驱动，电路的第二部分由负输入电压驱动。电路的每个部分中的晶体管钳位电压，从而限制电流输出。当电路的温度上升时，晶体管的负温度系数也降低了输出电流。

2. 发明授权

US3755751A High voltage solid-state amplifier having temperature responsive shutdown 失效
标题翻译：具有温度响应关断功能的高压固态放大器
公开(公告)号：US3755751A
公开(公告)日：1973-08-28
申请号：US3755751D
申请日：1971-10-21
申请人： MOTOROLA INC
发明人： RING C
IPC分类号： H03F1/52 , H03F3/30 , H03F1/32
CPC分类号： H03F3/3083 , H03F1/52
摘要： The amplifier circuit includes first and second output stages which respectively amplify positive and negative excursions of an input signal. A bias circuit connected to each stage prevents crossover distortion. A plurality of dependent current sources supplying the bias and amplifier stages are controlled by a master current source. Transistors having temperature responsive threshold voltages are thermally connected to each of the output stages and electrically connected between a constant bias supply and the master current source. If the temperature of either output stage increases above a predetermined value, the thermally associated transistor conducts and renders all of the current sources inoperative. Furthermore, diode strings are utilized to provide low base resistances and other transistors are utilized to provide high emitter resistances for selected transistors thereby enabling them to sustain high voltages.
摘要翻译：放大器电路包括分别放大输入信号的正和负偏移的第一和第二输出级。连接到每个级的偏置电路防止交叉失真。提供偏置和放大器级的多个依赖电流源由主电流源控制。具有温度响应阈值电压的晶体管热连接到每个输出级，并且电连接在恒定偏置电源和主电流源之间。如果任一输出级的温度升高到高于预定值，则热相关晶体管导通并使所有电流源不起作用。此外，二极管串用于提供低的基极电阻，并且其他晶体管用于为所选择的晶体管提供高发射极电阻，从而使它们能够维持高电压。

3. 发明授权

US5889433A Amplifier having a high current efficiency 失效
标题翻译：具有高电流效率的放大器
公开(公告)号：US5889433A
公开(公告)日：1999-03-30
申请号：US880694
申请日：1997-06-23
申请人： Tomoyuki Honma
发明人： Tomoyuki Honma
IPC分类号： H03F3/30 , H03F3/343 , H03F3/26
CPC分类号： H03F3/3432 , H03F3/3083
摘要： While no signals are being supplied to first and second drive circuits, the drive circuits keep supplying idling currents to the bases of first and second transistors which constitute a push-pull amplifier. A first control circuit is provided in the base-emitter path of the first transistor, to control the first transistor in accordance with an input signal. A second control circuit is provided in the base-emitter path of the second transistor, to control the second transistor in accordance with an input signal. The first control circuit comprises a third transistor, a first resistor connected between the collector and base of the third transistor, a third resistor connected between the collector of the third transistor and the base of the first transistor, a constant current source connected to the base of the third transistor. The second control circuit comprises a fourth transistor, a second resistor connected between the collector and base of the fourth transistor, a fourth resistor connected between the collector of the fourth transistor and the base of the second transistor, a constant current source connected to the base of the fourth transistor.
摘要翻译：当没有信号被提供给第一和第二驱动电路时，驱动电路保持向组成推挽放大器的第一和第二晶体管的基极提供空载电流。第一控制电路设置在第一晶体管的基极 - 发射极路径中，以根据输入信号控制第一晶体管。第二控制电路设置在第二晶体管的基极 - 发射极路径中，以根据输入信号控制第二晶体管。第一控制电路包括第三晶体管，连接在第三晶体管的集电极和基极之间的第一电阻器，连接在第三晶体管的集电极和第一晶体管的基极之间的第三电阻器，连接到基极的恒流源的第三晶体管。第二控制电路包括第四晶体管，连接在第四晶体管的集电极和基极之间的第二电阻器，连接在第四晶体管的集电极和第二晶体管的基极之间的第四电阻器，连接到基极的恒流源的第四晶体管。

4. 发明授权

US3868580A Bootstrapped amplifier 失效
标题翻译：引脚放大器
公开(公告)号：US3868580A
公开(公告)日：1975-02-25
申请号：US33205273
申请日：1973-02-12
申请人： TEKTRONIX INC
发明人： BATTJES CARL R
IPC分类号： H03F1/22 , H03F3/30 , H03F3/34 , H03F3/42 , H03F1/00
CPC分类号： H03F3/3083 , H03F3/42
摘要： A bootstrapped amplifier including an a11-NPN floating current source, an output current steering circuit, and an active feedback network has the capability of providing large, fast voltage changes efficiently and accurately on capacitive loads. Therefore, while the amplifier operates with low quiescent currents, it can supply large load currents of either polarity on demand. Because all of the transistors are of one conductivity type, and few additional components are required, the circuit is especially compatible to standard integrated circuit fabrication methods.

5. 发明授权

US07339428B2 Dual op amp IC with single low noise op amp configuration 有权
标题翻译：双运放IC，具有单个低噪声运算放大器配置
公开(公告)号：US07339428B2
公开(公告)日：2008-03-04
申请号：US11415663
申请日：2006-05-01
申请人： Derek F Bowers
发明人： Derek F Bowers
IPC分类号： H03F3/45
CPC分类号： H03F3/45192 , H03F1/26 , H03F3/211 , H03F3/3069 , H03F3/3083 , H03F3/4521 , H03F3/45475 , H03F3/602 , H03F2200/372 , H03F2203/45138 , H03F2203/45366 , H03F2203/45371
摘要： A multiple op amp IC with a single low noise op amp configuration comprises at least two op amp circuits fabricated on a common substrate. The IC can be configured such that the multiple op amps are connected in parallel to form a single op amp having output drive and input-referred noise characteristics which are superior to those of the constituent op amps. The IC can be fabricated with either first or second metallization patterns, with the first pattern providing multiple op amps with separate inputs and outputs, and the second pattern interconnecting the amplifiers to form a single op amp. The second pattern also preferably interconnects at least one set of corresponding high impedance nodes to prevent a difference voltage which might otherwise arise between the nodes due to component mismatches between the multiple op amps.
摘要翻译：具有单个低噪声运算放大器配置的多运算放大器IC包括在公共衬底上制造的至少两个运算放大器电路。 IC可以被配置为使得多个运算放大器并联连接以形成具有优于组成运算放大器的输出驱动和输入参考噪声特性的单个运算放大器。 IC可以用第一或第二金属化图案制造，第一图案提供具有单独输入和输出的多个运算放大器，并且第二图案将放大器互连以形成单个运算放大器。第二图案还优选地互连至少一组相应的高阻抗节点，以防止由于多个运算放大器之间的组件不匹配而在节点之间可能出现的差分电压。

6. 发明授权

US3185933A Class b amplifier circuit 失效
标题翻译： B类放大器电路
公开(公告)号：US3185933A
公开(公告)日：1965-05-25
申请号：US15350961
申请日：1961-11-20
申请人： AMPEX
发明人： EHRET ROBERT J
IPC分类号： H03F3/30
CPC分类号： H03F3/3083

7. 发明授权

US3181079A Series energized transistorised amplifier having a high input resistance 失效
标题翻译：具有高输入电阻的串联通电晶体管放大器
公开(公告)号：US3181079A
公开(公告)日：1965-04-27
申请号：US6856160
申请日：1960-11-10
申请人： PHILIPS CORP
发明人： FRANK BREGMAN
IPC分类号： H03F1/34 , H03F1/56 , H03F3/30
CPC分类号： H03F3/3083 , H03F1/34 , H03F1/56

8. 发明申请

US20070252652A1 Dual op amp IC with single low noise op amp configuration 有权
标题翻译：双运放IC，具有单个低噪声运算放大器配置
公开(公告)号：US20070252652A1
公开(公告)日：2007-11-01
申请号：US11415663
申请日：2006-05-01
申请人： Derek Bowers
发明人： Derek Bowers
IPC分类号： H03F3/14
CPC分类号： H03F3/45192 , H03F1/26 , H03F3/211 , H03F3/3069 , H03F3/3083 , H03F3/4521 , H03F3/45475 , H03F3/602 , H03F2200/372 , H03F2203/45138 , H03F2203/45366 , H03F2203/45371
摘要： A multiple op amp IC with a single low noise op amp configuration comprises at least two op amp circuits fabricated on a common substrate. The IC can be configured such that the multiple op amps are connected in parallel to form a single op amp having output drive and input-referred noise characteristics which are superior to those of the constituent op amps. The IC can be fabricated with either first or second metallization patterns, with the first pattern providing multiple op amps with separate inputs and outputs, and the second pattern interconnecting the amplifiers to form a single op amp. The second pattern also preferably interconnects at least one set of corresponding high impedance nodes to prevent a difference voltage which might otherwise arise between the nodes due to component mismatches between the multiple op amps.
摘要翻译：具有单个低噪声运算放大器配置的多运算放大器IC包括在公共衬底上制造的至少两个运算放大器电路。 IC可以被配置为使得多个运算放大器并联连接以形成具有优于组成运算放大器的输出驱动和输入参考噪声特性的单个运算放大器。 IC可以用第一或第二金属化图案制造，第一图案提供具有单独输入和输出的多个运算放大器，并且第二图案将放大器互连以形成单个运算放大器。第二图案还优选地互连至少一组相应的高阻抗节点，以防止由于多个运算放大器之间的组件不匹配而在节点之间可能出现的差分电压。

9. 发明授权

US3870965A Current mode operational amplifier 失效
标题翻译：电流模式运算放大器
公开(公告)号：US3870965A
公开(公告)日：1975-03-11
申请号：US32160773
申请日：1973-01-08
申请人： MOTOROLA INC
发明人： FREDERIKSEN THOMAS M
IPC分类号： G05F3/22 , G06G7/14 , H03F1/30 , H03F3/30 , H03F3/347 , H03K3/023 , H03K9/06 , H03K19/09 , H03F3/68
CPC分类号： H03K19/09 , G05F3/22 , G05F3/227 , G06G7/14 , H03F1/302 , H03F1/307 , H03F3/3083 , H03F3/347 , H03K3/023 , H03K9/06
摘要： A current mode operational amplifier is shown which is powered by a single voltage supply and operates in response to input signals represented by current values. The input system for the operational amplifier employs an inverting input circuit responsive to a first input signal and a non-inverting input circuit responsive to a second input signal. A current mirror circuit is employed for subtracting one input signal from the second input signal and the difference signal is applied to the operational amplifier.
摘要翻译：示出了由单个电源供电并且响应于由电流值表示的输入信号而工作的电流模式运算放大器。用于运算放大器的输入系统使用响应于第二输入信号的第一输入信号和非反相输入电路的反相输入电路。采用电流镜电路从第二输入信号中减去一个输入信号，差分信号被施加到运算放大器。

10. 发明授权

US3693106A Stable power amplifier circuit 失效
标题翻译：稳定的功率放大器电路
公开(公告)号：US3693106A
公开(公告)日：1972-09-19
申请号：US3693106D
申请日：1970-11-02
申请人： ERNEST L LONG , CHARLES M RING
发明人： LONG ERNEST L , RING CHARLES M
IPC分类号： H03F3/18 , H03F3/20 , H03F3/213 , H03F3/30 , H03F3/347
CPC分类号： H03F3/3083 , H03F3/213 , H03F3/347
摘要： An integrated circuit power amplifier utilizes a quasicomplementary power output stage incorporating an NPN Darlington amplifier for one section and a field-aided lateral PNP transistor cascaded to an NPN Darlington amplifier for the other section. Feedback from the amplifier output terminal to an intermediate stage coupled to the input of the power output stage is separated into DC and AC feedback paths. The biasing of the power output stage includes an epitaxial resistance matched to the field-aided transistor bulk resistance to cancel the effect of the bulk resistance for improved output stage thermal stability.

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