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公开(公告)号：US5929708A
公开(公告)日：1999-07-27
申请号：US974818
申请日：1997-11-20
CPC分类号： H03F3/50 , H03D7/1408 , H03D7/1433 , H03D7/1458 , H03D2200/0033 , H03D2200/0088
摘要： A power-conserving, linear and broad band RF amplifier, suitable for use at more than one band in the ultra-high frequency regions allotted to radiotelephone transceivers, employs an emitter-follower output transistor to deliver the nominal 1.0 milliwatt RF power to a single-ended load from a low voltage battery, typically 2.7 v. dc, without the use of output coupling transformers. The amplifier receives only a small differential input signal from the preceding mixer or multiplier stage having a typical peak-to-peak magnitude of 0.3 v. The differential input signal is applied to the emitters of a pair of transistors whose bases are interconnected, one transistor of which (B6) is diode-connected in a current-mirror configuration and the other (B5) of which is configured in a common-base connection with emitter degeneration. The signals are summed at the collector of the common-base transistor to deliver a substantial voltage swing, illustratively 1.7 volts peak to peak, which is large enough to drive the base of the emitter-follower output transistor (B3) without requiring the high standby current in the emitter-follower normally required to maintain an emitterfollower in Class A operation.
摘要翻译： 适用于分配给无线电话收发器的超高频区域的多个频带的功率节省，线性和宽带RF放大器采用射极跟随器输出晶体管，将标称1.0毫瓦射频功率提供给单个 来自低压电池（通常为2.7 V DC）的负载，不使用输出耦合变压器。 放大器仅接收来自前一个混频器或乘法器级的小差分输入信号，其典型的峰峰值幅度为0.3v，差分输入信号被施加到其基极互连的一对晶体管的发射极，一个晶体管 其中（B6）以电流镜配置二极管连接，另一个（B5）配置为与发射极退化的共基极连接。 这些信号在公共基极晶体管的集电极处相加，以实现显着的电压摆幅，例如为峰值峰值为1.7伏，其足够大以驱动发射极跟随器输出晶体管（B3）的基极，而不需要高的待机 通常在A类操作中维持发射器跟踪器所需的发射极跟随器中的电流。
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公开(公告)号：US3973143A
公开(公告)日：1976-08-03
申请号：US536853
申请日：1974-12-27
CPC分类号： H03K17/74
摘要： An electronic switch is disclosed comprising a transistor bridge having input and output signaling nodes and bias control nodes. A pair of matched current sources are selectively activated and deactivated in a series arrangement with symmetrical turn-on turn-off circuitry in response to a receipt of instruction signals. The instruction signals control the gating of a constant current to the turn-on/off circuitry for enabling the matched current sources to selectively apply and withdraw matched currents from bias control nodes. Switched turn-off circuitry is employed for reverse biasing the transistor bridge in response to a deactivation of the matched current sources. A pair of voltage reference and antisaturation circuits cooperate with bridge discharge circuits to effect the reverse biasing of the bridge and to discharge rapidly the effective electrical capacitance of that bridge shortly after the receipt of a bridge turn-off instruction.
摘要翻译： 公开了一种电子开关，其包括具有输入和输出信令节点和偏置控制节点的晶体管桥。 响应于接收到指令信号，一对匹配的电流源被选择性地以具有对称的导通关断电路的串联布置被激活和去激活。 指令信号控制向导通/断开电路施加恒定电流的门控，以使匹配的电流源能够有选择地从偏置控制节点应用和撤出匹配的电流。 开关关断电路用于响应于匹配的电流源的去激活来反向偏置晶体管桥。 一对电压基准和抗饱和电路与桥式放电电路配合，以实现桥接器的反向偏置，并在接收到桥接断开指令后不久快速放电该桥接器的有效电容。
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公开(公告)号：US5838187A
公开(公告)日：1998-11-17
申请号：US797149
申请日：1997-02-10
申请人： Milton Luther Embree
发明人： Milton Luther Embree
IPC分类号： G01K7/01 , H02H5/04 , H03K17/14 , H03K19/003 , H03K5/24
CPC分类号： H03K19/003 , G01K7/01 , H03K17/14 , H02H5/042 , H02H5/044
摘要： The specification relates to a thermal shutdown circuit for an integrated circuit. Two matching thermal sensing resistors are used to develop a voltage representing the relative differential temperature between the two resistors. One resistor is fabricated within the integrated circuit dissipating device dielectric isolation tub and therefore its temperature closely follows the temperature of the dissipating device. The second thermal sensing resistor reflects the ambient temperature of the integrated circuit. A third thermal sensing device is used to obtain actual absolute temperature at the location of the second thermal sensing resistor. By algebraically adding a voltage representing actual absolute temperature at an ambient temperature location with a voltage representing the relative differential temperature between thermal sensing resistors, a voltage representing the actual absolute temperature of the dissipating device is produced. The resulting voltage is compared to a reference voltage, the reference voltage representing a high temperature setpoint, so that when the temperature of the dissipating device exceeds the high temperature setpoint, a thermal shutdown signal is actuated.
摘要翻译： 本说明书涉及用于集成电路的热关断电路。 使用两个匹配的热敏电阻来形成表示两个电阻之间的相对温差的电压。 在集成电路消散装置介电隔离桶内制造一个电阻器，因此其温度跟散热装置的温度紧密相关。 第二个热敏电阻反映了集成电路的环境温度。 第三热感测装置用于获得第二热敏电阻器位置处的实际绝对温度。 通过代表性地将表示实际绝对温度的电压加到表示温度感测电阻器之间的相对温差的电压，产生表示散热装置的实际绝对温度的电压。 将所得到的电压与参考电压进行比较，参考电压表示高温设定点，使得当消散装置的温度超过高温设定点时，启动热关断信号。
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公开(公告)号：US5689211A
公开(公告)日：1997-11-18
申请号：US601414
申请日：1996-02-14
申请人： Milton Luther Embree
发明人： Milton Luther Embree
CPC分类号： H03F3/3071 , H03F1/307
摘要： The invention is an amplifier such as an operational amplifier having an output stage with a reduced quiescent current control transistor device area that provides sufficient quiescent current control for proper operation thereof. The output stage includes a current diverter or diverting arrangement whereby current flowing to the quiescent current control transistor area is reduced by diversion without jeopardizing the proper operation of the operational amplifier. In this manner, the relative size of the quiescent current control transistors can be significantly reduced without sacrificing any of the overall performance of the amplifier.
摘要翻译： 本发明是一种具有运算放大器的放大器，具有具有降低的静态电流控制晶体管器件区域的输出级，其提供足够的静态电流控制以便其正常操作。 输出级包括电流分流器或转向装置，由此流过静态电流控制晶体管区域的电流通过转移而减小而不损害运算放大器的正确操作。 以这种方式，可以显着地减少静态电流控制晶体管的相对尺寸，而不牺牲放大器的整体性能。
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公开(公告)号：US4087647A
公开(公告)日：1978-05-02
申请号：US800220
申请日：1977-05-25
CPC分类号： H04M19/001
摘要： A local battery feed circuit for telephone station sets comprises two half circuit portions substantially symmetric about an imaginary line midway between the TIP and RING telephone lines. Each half circuit includes a current drive amplifier including a pair of up-down emitter follower transistors and a driver transistor. A coupling capacitor and matched resistors provide common mode interference reduction without degrading differential mode signals. Power supply noise is substantially eliminated by transistors in each half circuit arranged to produce an a.c. current equal and opposite to that generated from the power source.
摘要翻译： 用于电话台的本地电池馈送电路包括两个半电路部分，其基本上对称于TIP和RING电话线之间的假想线。 每个半电路包括电流驱动放大器，其包括一对上升射极跟随器晶体管和驱动晶体管。 耦合电容和匹配电阻提供共模干扰减少，而不会降低差分模式信号。 每个半电路中的晶体管基本上消除了电源噪声，布置成产生一个交流电。 电流与电源产生的相同和相反。
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公开(公告)号：US06013934A
公开(公告)日：2000-01-11
申请号：US819828
申请日：1997-03-18
CPC分类号： H01L29/7824 , H01L27/0248
摘要： A semiconductor structure having a temperature sensor placed in close proximity to gate and source and/or drain electrodes. The sensor is compatible with conventional semiconductor processing and is typically made from doped polysilicon having a large temperature coefficient of resistivity. At least one sensor may be placed under, but insulated from, source or drain electrodes to protect against high electric fields. The sensor is also compatible with bipolar semiconductor structures.
摘要翻译： 具有放置在栅极和源极和/或漏极附近的温度传感器的半导体结构。 该传感器与传统的半导体处理兼容，并且通常由具有大的电阻温度系数的掺杂多晶硅制成。 至少一个传感器可以放置在源电极或漏电极之下但与之隔绝，以防止高电场。 传感器也兼容双极半导体结构。
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7.发明授权
公开(公告)号：US5903190A
公开(公告)日：1999-05-11
申请号：US889910
申请日：1997-07-10
CPC分类号： H03F3/345 , H03F3/3437
摘要： Embodiments of the invention include an amplifier having an enhanced feedforward arrangement. In a typical operational amplifier output stage of this type, conventional feedforward arrangements comprise one or more active electrical components coupled between the second stage amplifying transistor and the negative output driver. The enhanced feedforward arrangement includes a resistor connected between the second stage amplifying transistor and the negative voltage source and a second resistor connected between the second stage amplifying transistor and the negative output driver. Alternatively, a capacitor is connected in parallel with the second resistor. In this manner, feedforward arrangements according to embodiments of the invention advantageously provide stable, enhanced frequency response, including high frequency response, e.g., above approximately 10 kHz, using economically advantageous passive rather than active electrical components. Furthermore, feedforward arrangements according to embodiments of the invention typically require less components than conventional feedforward arrangements, making them further advantageous from an economic standpoint.
摘要翻译： 本发明的实施例包括具有增强的前馈布置的放大器。 在这种典型的运算放大器输出级中，常规的前馈布置包括耦合在第二级放大晶体管和负输出驱动器之间的一个或多个有源电气元件。 增强的前馈装置包括连接在第二级放大晶体管和负电压源之间的电阻器以及连接在第二级放大晶体管和负输出驱动器之间的第二电阻器。 或者，电容器与第二电阻器并联连接。 以这种方式，根据本发明的实施例的前馈布置有利地使用经济上有利的被动而不是有源电气部件来提供稳定的，增强的频率响应，包括高频响应，例如高于大约10kHz。 此外，根据本发明的实施例的前馈布置通常比常规的前馈布置要求较少的组件，从经济的观点来看，其进一步有利。
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公开(公告)号：US5684432A
公开(公告)日：1997-11-04
申请号：US578819
申请日：1995-12-26
申请人： Milton Luther Embree
发明人： Milton Luther Embree
IPC分类号： H03F3/30
CPC分类号： H03F3/3001
摘要： The invention is an operational amplifier having an output stage for enhancing the output driver capability near the negative source voltage. The output stage of the invention includes a voltage detector in combination with a current redirector or redirecting arrangement. The voltage detector converts the voltage difference between the amplifier output and the input to the output stage of the amplifier to a control current, which is redirected at the positive source voltage and applied to the negative output driver. The current redirector, which is operably connected to the voltage detector, allows the amplifier output to be driven at full rated current (e.g., approximately 40 mA) close to the negative source voltage (e.g., within approximately 1.5 volts) while maintaining an output configuration appropriate for stability.
摘要翻译： 本发明是具有用于增强靠近负电源电压的输出驱动器能力的输出级的运算放大器。 本发明的输出级包括与当前重定向器或重定向装置组合的电压检测器。 电压检测器将放大器输出和放大器输出级的输入端之间的电压差转换为控制电流，控制电流以正源电压重定向并施加到负输出驱动器。 可操作地连接到电压检测器的当前重定向器允许放大器输出以接近负电源电压（例如，在大约1.5伏特内）的全额定电流（例如，大约40mA）被驱动，同时保持输出配置 适合稳定。
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公开(公告)号：US4046968A
公开(公告)日：1977-09-06
申请号：US711810
申请日：1976-08-05
CPC分类号： H04M19/003
摘要： A line transformer circuit in which the DC component of magnetization produced in the tip and ring windings by the battery supplying loop current to the telephone set microphone may be neutralized by an oppositely-poled, serially-connected balancing winding is disclosed. One end of the balancing winding is connected to the supply battery and is, therefore, at AC ground. The other end is kept at a point of high AC impedance to ground by the collector of a transistor so that audio frequency voltages induced in the balancing winding cannot load the transformer. The AC currents in the tip and ring windings are provided with a virtual ground return path by means of a differential amplifier controlled Darlington pair in circuit between the tip and ring windings and the balancing winding. The AC components of the Darlington pair collector current are bypassed to ground by a shunt capacitor at the junction of the Darlington pair collector terminal and the third winding. The differential amplifier senses voltage changes at the virtual ground so that the Darlington pair is driven to suppress these changes. Advantageously, the differential amplifier may be powered from the voltage drop appearing across the Darlington pair thereby facilitating circuit integration.
摘要翻译： 公开了一种线路变压器电路，其中通过电池供电回路电流在电话机麦克风中在尖端和环绕组中产生的磁化的DC分量可被相对极化的串联连接的平衡绕组中和。 平衡绕组的一端连接到电源电池，因此处于AC地。 另一端通过晶体管的集电极保持在高交流阻抗的接地点，使得在平衡绕组中感应的音频电压不能加载变压器。 尖端和环绕组中的交流电流通过在尖端和环绕组与平衡绕组之间的电路中的差分放大器控制的达林顿对设置有虚拟接地返回路径。 达林顿对集电极电流的交流分量通过位于达林顿对集电极端子和第三绕组的连接处的并联电容器旁路接地。 差分放大器感测虚拟地面的电压变化，以便驱动达林顿对以抑制这些变化。 有利的是，差分放大器可以通过达林顿对出现的电压降来供电，从而便于电路集成。
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