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1.发明授权Peak and valley signal measuring circuit using single digital-to-analog converter 失效使用单个数模转换器的峰谷信号测量电路
公开(公告)号：US5555452A
公开(公告)日：1996-09-10
申请号：US439910
申请日：1995-05-12
CPC分类号： H04L25/062 , G06F1/02 , G08B3/1066 , H04B1/1027 , H04B1/30
摘要： A peak and valley measuring circuit (40) featuring a single digital-to-analog converter (DAC) (100), a peak counter (110), a valley counter (120), and a comparator (130). The peak and valley measuring circuit (40) uses the peak counter (110) when detecting peaks of the recovered audio signal and the valley counter (120) when detecting valleys of the recovered audio signal. The DAC (100) is used in conjunction with one of the counters (110) or (120) depending on whether peaks or valleys are being detected, and is preferably a current-mode DAC.
摘要翻译： 具有单个数模转换器（DAC）（100），峰值计数器（110），谷值计数器（120）和比较器（130）的峰谷测量电路（40）。 当检测到恢复的音频信号的谷时，峰值和谷值测量电路（40）使用峰值计数器（110）来检测恢复的音频信号和谷值计数器（120）的峰值。 根据是检测峰值还是谷值，DAC（100）与计数器（110）或（120）中的一个结合使用，优选地是电流模式DAC。
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2.发明授权Zerox-IF receiver with tracking second local oscillator and demodulator phase locked loop oscillator 失效具有跟踪第二本地振荡器和解调器锁相环振荡器的Zerox-IF接收器
公开(公告)号：US5606731A
公开(公告)日：1997-02-25
申请号：US399805
申请日：1995-03-07
摘要： A zero-intermediate frequency receiver circuit (11) for receiving a radio frequency signal detected by an antenna (14). The receiver circuit (10) comprises a second local oscillator circuit (25) and an oscillator circuit (60) of a phase locked loop demodulator (36) which are identical and track each other so as to provide a more accurate reference for processing a demodulated signal. A current reference (39) providing a current reference signal utilized by the second local oscillator circuit (25) and the oscillator circuit (60) of the phase locked loop demodulator (36).
摘要翻译： 一种用于接收由天线（14）检测的射频信号的零中频接收机电路（11）。 接收机电路（10）包括第二本地振荡器电路（25）和锁相环解调器（36）的振荡器电路（60），它们彼此相同并相互跟踪，以便提供更准确的参考用于处理解调的 信号。 提供由第二本地振荡器电路（25）和锁相环解调器（36）的振荡器电路（60）使用的电流参考信号的电流参考（39）。
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公开(公告)号：US5604926A
公开(公告)日：1997-02-18
申请号：US399784
申请日：1995-03-07
摘要： A phase locked loop (PLL) circuit for use as a demodulator and other applications. The PLL circuit (200) comprises a phase detector (210), a transconductance amplifier (212) and a current controlled oscillator (ICO) (214). The phase detector has two signal inputs and two outputs, and detects a phase difference between signals at its inputs. A capacitor C1 is connected to the output of phase detector (210) and develops an output voltage signal vo(t). A transconductance amplifier (212) is coupled to the capacitor C1 and converts the output voltage signal vo(t) to an output current signal. The ICO (214) is coupled to the transconductance amplifier (212) and the second output of the phase detector (210) and generates an output signal having a frequency which is proportional to an input current signal. The output signal of the ICO (214) is coupled to the second signal input of the phase detector (212).
摘要翻译： 用作解调器和其他应用的锁相环（PLL）电路。 PLL电路（200）包括相位检测器（210），跨导放大器（212）和电流控制振荡器（ICO）（214）。 相位检测器具有两个信号输入和两个输出，并检测其输入信号之间的相位差。 电容器C1连接到相位检测器（210）的输出端并产生输出电压信号vo（t）。 跨导放大器（212）耦合到电容器C1，并将输出电压信号vo（t）转换成输出电流信号。 ICO（214）耦合到跨导放大器（212）和相位检测器（210）的第二输出端，并产生具有与输入电流信号成比例的频率的输出信号。 ICO（214）的输出信号耦合到相位检测器（212）的第二信号输入端。
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公开(公告)号：US5471665A
公开(公告)日：1995-11-28
申请号：US324634
申请日：1994-10-18
申请人： Gary L. Pace , James D. Hughes
发明人： Gary L. Pace , James D. Hughes
CPC分类号： H03F3/45085 , H03D3/008 , H03F3/45511 , H03F3/45973 , H04B1/30 , H03D7/165
摘要： A differential direct current (DC) offset compensation circuit for providing DC offset compensation to a circuit device (110). The DC offset compensation circuit (100) comprises a differential integrator (120) and a summing network (130). The circuit device (110) is one of several types of devices, such as a DC coupled amplifier. The differential input (112) of the circuit device (110) is suitable for coupling to a differential input source (140) and the differential output (114) of the circuit device is suitable for connection to a load (150). The differential integrator (120) features a transconductance amplifier (18) at least one other amplifier (13), and a capacitor element (16) having a capacitance of C1. The summing network (130) sums the differential integrator output with the differential input signals of the differential input source (140) and cancels DC offsets of the differential input source (140) and the circuit device (110).
摘要翻译： 一种用于向电路装置（110）提供DC偏移补偿的差分直流（DC）偏移补偿电路。 DC偏移补偿电路（100）包括差分积分器（120）和求和网络（130）。 电路装置（110）是诸如DC耦合放大器的几种类型的装置之一。 电路设备（110）的差分输入（112）适于耦合到差分输入源（140），并且电路设备的差分输出（114）适于连接到负载（150）。 差分积分器（120）具有至少一个其他放大器（13）的跨导放大器（18）和具有C1电容的电容器元件（16）。 求和网络（130）将差分积分器输出与差分输入源（140）的差分输入信号相加，并且消除差分输入源（140）和电路装置（110）的DC偏移。
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5.发明授权Fully differential transconductance amplifier with common-mode output voltage stabilization 失效全差分跨导放大器，具有共模输出电压稳定
公开(公告)号：US5436594A
公开(公告)日：1995-07-25
申请号：US324636
申请日：1994-10-18
申请人： Gary L. Pace , James D. Hughes
发明人： Gary L. Pace , James D. Hughes
IPC分类号： H03F3/45
CPC分类号： H03F3/45511 , H03F3/45085 , H03F2203/45631
摘要： A differential transconductance amplifier consisting of a bipolar differential amplifier (110) and an active load circuit (120) for the bipolar differential amplifier (110). The transconductance amplifier is suitable for driving a load (130). The active load circuit (120) comprises a bipolar differential amplifier (140), a metal-oxide-silicon (MOS) amplifier (150), and a resistor R1. The active load circuit (120) generates active load currents IAL1 and IAL2. The output of the transconductance amplifier are the differential output currents I1 and I2 which are supplied to the load (130). Differential output currents I1 and I2 are the sum of the currents into the nodes between the bipolar amplifier circuit (110) and the active load circuit (120). The gain of the transconductance amplifier is controlled by a current source that biases the differential amplifier (110).
摘要翻译： 一种由双极差分放大器（110）和用于双极差分放大器（110）的有源负载电路（120）组成的差分跨导放大器。 跨导放大器适用于驱动负载（130）。 有源负载电路（120）包括双极差分放大器（140），金属氧化物硅（MOS）放大器（150）和电阻器R1。 有源负载电路（120）产生有源负载电流IAL1和IAL2。 跨导放大器的输出是提供给负载（130）的差分输出电流I1和I2。 差分输出电流I1和I2是双极放大器电路（110）和有源负载电路（120）之间的节点之间的电流之和。 跨导放大器的增益由偏置差分放大器（110）的电流源控制。
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公开(公告)号：US5125112A
公开(公告)日：1992-06-23
申请号：US583920
申请日：1990-09-17
IPC分类号： G05F3/30
CPC分类号： G05F3/30
摘要： A temperature compensated current source (300) is provided that senses a first reference voltage (301) to control a second reference current (302). The current source comprises means (304, 305, 306) for deriving a first reference current (303) in response to the first reference voltage (301) and means (304, 305, 307, 309, 310, 311, 312, 313) for maintaining a desired temperature coefficient of the second reference current (302) by sensing the first reference voltage (301) to control the second reference current (302).
摘要翻译： 提供温度补偿电流源（300），其感测第一参考电压（301）以控制第二参考电流（302）。 电流源包括用于响应于第一参考电压（301）和装置（304,305,307,309,310,311,312,313）导出第一参考电流（303）的装置（304,305,306） 用于通过感测第一参考电压（301）来控制第二参考电流（302）来保持期望的温度系数以控制第二参考电流（302）。
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公开(公告)号：US4929851A
公开(公告)日：1990-05-29
申请号：US299180
申请日：1989-01-23
申请人： Gary L. Pace
发明人： Gary L. Pace
IPC分类号： G01R19/165 , H03K5/08 , H04B1/16 , H04L27/14
CPC分类号： G01R19/1658 , H03K5/086 , H04L27/142 , H04W52/0229
摘要： A data limiter for a radio pager is described in which an analog input signal including a data signal is compared in a comparator with a threshold voltage which is adjusted by means of a feedback network. The network consists of transconductance amplifiers having predetermined input offset voltages related to the amplitude of the analog signal which monitor the departure of the analog signal from a reference voltage to provide output currents which are integrated by an integrator and applied as the threshold voltage to the comparator and as the reference voltage to the transconductance amplifiers.
摘要翻译： 描述了一种用于无线寻呼机的数据限制器，其中包括数据信号的模拟输入信号在比较器中与通过反馈网络调整的阈值电压进行比较。 该网络由跨导放大器组成，其具有与模拟信号幅度相关的预定输入偏移电压，该输入偏移电压监测模拟信号与参考电压的偏离，以提供由积分器积分并作为阈值电压施加到比较器的输出电流 并作为跨导放大器的参考电压。
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公开(公告)号：US5744984A
公开(公告)日：1998-04-28
申请号：US748641
申请日：1996-11-13
CPC分类号： H02J7/0068 , G05F1/613 , G08B3/1066 , H03K17/14 , H03K17/60
摘要： A driver circuit (100) is utilized to drive a high current load (116) in an electronic device powered by a battery (118) having a terminal voltage which varies in relation to a level of energy being consumed. The driver circuit (100) includes a differential amplifier (110) which is responsive to a predetermined reference voltage and to the terminal voltage for generating a drive control signal which proportionally reduces a current supplied to the high current load (114) when the terminal voltage is substantially equal to and lower than the predetermined reference voltage. A slope control element (112) is coupled to the differential amplifier (110) to control a rate at which the drive control signal reduces proportionally the current supplied to the high current load (116). A load control element (114), coupled to the differential amplifier (100), provides the supply of current to the high current load (116).
摘要翻译： 驱动器电路（100）用于驱动由电池（118）供电的电子设备中的高电流负载（116），该电池具有相对于被消耗的能量水平而变化的端电压。 驱动器电路（100）包括响应于预定参考电压的差分放大器（110）和用于产生驱动控制信号的端子电压，所述驱动控制信号当端电压（114）被成比例地减小提供给高电流负载（114）的电流 基本上等于和低于预定参考电压。 斜率控制元件（112）耦合到差分放大器（110）以控制驱动控制信号成比例地减小提供给高电流负载（116）的电流的速率。 耦合到差分放大器（100）的负载控制元件（114）向高电流负载（116）提供电流供应。
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公开(公告)号：US4908523A
公开(公告)日：1990-03-13
申请号：US176960
申请日：1988-04-04
申请人： Gregory O. Snowden , Joan S. DeLuca , Gary L. Pace
发明人： Gregory O. Snowden , Joan S. DeLuca , Gary L. Pace
CPC分类号： G06F1/3228 , G06F1/30 , G08B3/1066 , H02J9/061 , H04W52/0296 , Y10T307/305 , Y10T307/50 , Y10T307/625
摘要： A power switching circuit is described for supplying power to a radio pager which must be continuously powered from either a main or backup battery. The main battery voltage is monitored and at appropriate levels as its value falls, selected functions of the pager are eliminated and switch over to the backup battery is made to keep alive essential functions.
摘要翻译： 描述了用于向无线寻呼机供电的电源开关电路，该无线寻呼机必须由主电池或备用电池连续供电。 监控主电池电压，并在其值下降时按适当的水平，消除寻呼机的所选功能，切换到备用电池以保持活动必要功能。
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公开(公告)号：US4340868A
公开(公告)日：1982-07-20
申请号：US148850
申请日：1980-05-12
申请人： Gary L. Pace
发明人： Gary L. Pace
CPC分类号： H03H11/1213
摘要： A configuration of two transistors and two capacitors provides a current mode second-order active filter for IC implementation with low-pass, bandpass and high-pass capabilities. The filter frequency is tunable over a wide range, independently of filter Q and gain, by varying a DC bias current. The filter can provide one-port impedance functions, and two-port voltage, current and impedance transfer functions. With the addition of a second biasing current source, the filter Q can be controlled by adjusting the ratio of the two biasing current sources. Enhanced dynamic range and large-signal performance can be achieved by the addition of linear resistors, with trade-offs in tunable frequency range and frequency linearity.
摘要翻译： 两个晶体管和两个电容器的配置为具有低通，带通和高通能力的IC实现提供了一种电流模式二阶有源滤波器。 通过改变直流偏置电流，滤波器频率可以在宽范围内可调，独立于滤波器Q和增益。 滤波器可以提供单端口阻抗功能，以及双端口电压，电流和阻抗传递功能。 通过添加第二偏置电流源，可以通过调节两个偏置电流源的比率来控制滤波器Q。 通过添加线性电阻可以实现增强的动态范围和大信号性能，在可调频率范围和频率线性度方面进行权衡。
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