Differential DC offset compensation circuit
    1.
    发明授权
    Differential DC offset compensation circuit 失效
    差分直流偏移补偿电路

    公开(公告)号:US5471665A

    公开(公告)日:1995-11-28

    申请号:US324634

    申请日:1994-10-18

    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。

    Fully differential transconductance amplifier with common-mode output
voltage stabilization
    2.
    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

    IPC分类号: H03F3/45

    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。

    Peak and valley signal measuring circuit using single digital-to-analog
converter
    3.
    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

    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。

    Temperature compensated current source
    4.
    发明授权
    Temperature compensated current source 失效
    温度补偿电流源

    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)。

    Data limiter for a radio pager
    5.
    发明授权
    Data limiter for a radio pager 失效
    无线寻呼机的数据限制器

    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

    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。

    Driver circuit providing controllable battery overload protection
    6.
    发明授权
    Driver circuit providing controllable battery overload protection 失效
    驱动电路提供可控电池过载保护

    公开(公告)号:US5744984A

    公开(公告)日:1998-04-28

    申请号:US748641

    申请日:1996-11-13

    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。

    Current mode biquadratic active filter
    8.
    发明授权
    Current mode biquadratic active filter 失效
    电流模式双向有源滤波器

    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

    IPC分类号: H03H11/12 H03H11/04 H03F1/34

    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。

    Apparatus for detecting completion of energy transfer in an inductive DC
to DC converter
    9.
    发明授权
    Apparatus for detecting completion of energy transfer in an inductive DC to DC converter 失效
    用于检测电感式DC至DC转换器中的能量传递完成的装置

    公开(公告)号:US5463306A

    公开(公告)日:1995-10-31

    申请号:US93488

    申请日:1993-07-19

    IPC分类号: H02M3/156 G05F1/575

    CPC分类号: H02M3/156 H02M2001/0009

    摘要: A detector circuit (301) is utilized in a DC to DC converter (300) having an inductor (356) coupled to a switch (358) for interrupting an electric current through the inductor (356), thereby allowing the inductor (356) to transfer stored energy to a capacitive load (364). The detector circuit (301) includes a capacitor (302) coupled to the inductor (356) for generating a transient current (428) in response to a completion of a transfer of stored energy from the inductor (356). The detector circuit (301) further includes a reference current generator (306) for generating a reference current, and a summing node (304) coupled to the capacitor (302) and coupled to the reference current generator (306) for summing the transient current (428) and the reference current. The two summed currents form a transient control current (436) responsive to the completion (424) of the transfer of stored energy from the inductor (356).

    摘要翻译: 检测器电路(301)用于具有耦合到开关(358)的电感器(356)的DC-DC转换器(300),用于中断通过电感器(356)的电流,从而允许电感器(356) 将存储的能量传送到电容性负载(364)。 检测器电路(301)包括耦合到电感器(356)的电容器(302),用于响应于来自电感器(356)的存储能量的传送的完成而产生瞬态电流(428)。 检测器电路(301)还包括用于产生参考电流的参考电流发生器(306)和耦合到电容器(302)并耦合到参考电流发生器(306)的求和节点(304),用于对瞬态电流求和 (428)和参考电流。 响应于来自电感器(356)的储存能量转移的完成(424),两个相加电流形成瞬态控制电流(436)。

    Combined radio pager/timepiece apparatus with receiver desensitization
protection
    10.
    发明授权
    Combined radio pager/timepiece apparatus with receiver desensitization protection 失效
    具有接收机脱敏保护的组合式无线寻呼机/钟表装置

    公开(公告)号:US4845485A

    公开(公告)日:1989-07-04

    申请号:US139239

    申请日:1987-12-29

    申请人: Gary L. Pace

    发明人: Gary L. Pace

    IPC分类号: G08B3/10 G08B5/22

    摘要: A combined radio pager/analog timepiece that may be worn on the wrist of the user is described. The device includes a stepping motor to periodically advance the second hand of the watch portion. The voltage pulse device signals to the timepiece are effectively inhibited during those intervals when the paging receiver is activated. Receiver activation occurs so as to monitor its communication channel or actually process an intended message if its unique address has been received and detected. These inhibited, i.e. delayed, voltage device pulses are later applied to the stepping motor on an accelerated basis to bring the timepiece to current time status.

    摘要翻译: 描述可以佩戴在用户手腕上的组合的无线寻呼机/模拟时计。 该装置包括步进马达以周期性地推进手表部分的秒针。 当寻呼接收机被激活时,在这些间隔期间,有效地抑制到时钟的电压脉冲装置信号。 发生接收器激活,以便监视其通信信道或者如果已经接收和检测到其唯一地址,则实际处理预期消息。 这些被抑制的,即延迟的电压装置脉冲随后被加速地施加到步进电机,以使该时钟处于当前时间状态。