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公开(公告)号：US5974041A
公开(公告)日：1999-10-26
申请号：US579169
申请日：1995-12-27
IPC分类号： H03F99/00 , H03F1/02 , H03F1/32 , H03F3/60 , H03F3/68 , H03F3/72 , H03G3/02 , H03G3/30 , H04B1/04 , H04B7/26 , H04J13/00
CPC分类号： H03F3/211 , H03F1/0277 , H03F1/0288 , H03F3/602 , H03F3/72 , H03G3/3042 , H04B1/0483 , H03F2200/294 , H03F2203/7236 , H04B2001/0408
摘要： An amplifier circuit for providing an amplified signal in response to an input signal. The amplifier circuit includes an input network for applying the input signal to a selected at least one of a plurality of amplifier stages. An output network is provided for coupling the amplified signal from the selected at least one amplifier stage. The appropriate amplifier stage is selected by a control circuit in response to a desired power value of the amplified signal. By selectively activating only the amplifier stage(s) that are necessary to provide the desired level of output power, increased DC efficiency can be accomplished in applications that require an amplifier which operates linearly over a wide dynamic range.
摘要翻译： 一种用于响应于输入信号提供放大信号的放大器电路。 放大器电路包括用于将输入信号施加到所选择的多个放大器级中的至少一个的输入网络。 提供输出网络用于耦合来自所选择的至少一个放大器级的放大信号。 响应于放大信号的期望功率值，控制电路选择合适的放大器级。 通过选择性地仅激活提供期望电平的输出功率所需的放大器级，可以在需要在宽动态范围内线性运行的放大器的应用中实现增加的DC效率。
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2.发明授权
公开(公告)号：US5576662A
公开(公告)日：1996-11-19
申请号：US547340
申请日：1995-10-24
摘要： A high dynamic range linear automatic gain control (AGC) circuit that has independent means for temperature compensation. The temperature compensation circuit of this invention can be used in a closed-loop AGC circuit such as is required in a transceiver for compensating the gains of receiver and transmitter amplifiers to ensure that both track closely over ranges of temperature, frequency and load impedance. The temperature compensation signal is coupled to one of the two gates in a field effect transistor (FET) amplifier to maintain a constant gain function over ranges of temperature, frequency and load impedance. Thermal compensation for the transmitter amplifier is derived from the thermal compensation signal for the receiver amplifier.
摘要翻译： 高动态范围线性自动增益控制（AGC）电路，具有独立的温度补偿装置。 本发明的温度补偿电路可以用在诸如收发器中所需的闭环AGC电路中，用于补偿接收机和发射机放大器的增益，以确保两个轨道紧密接近温度，频率和负载阻抗的范围。 温度补偿信号耦合到场效应晶体管（FET）放大器中的两个栅极中的一个，以在温度，频率和负载阻抗范围内保持恒定的增益函数。 发射机放大器的热补偿来自接收放大器的热补偿信号。
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3.发明授权Method/apparatus for an accelerated response to resource allocation requests in a CDMA push-to-talk system using a CDMA interconnect subsystem to route calls 失效用于使用CDMA互连子系统来路由呼叫的CDMA即按即说系统中的资源分配请求的加速响应的方法/装置
公开(公告)号：US5983099A
公开(公告)日：1999-11-09
申请号：US661690
申请日：1996-06-11
CPC分类号： H04W72/005 , H04W84/08 , H04W28/26 , H04W4/10 , H04W76/005
摘要： In a push-to-talk dispatch system, a method and apparatus for providing an accelerated response to a push-to-talk origination message. A first base station allocates a first set of equipment to support a push-to-talk connection. A first system controller allocates a second set of equipment to support the push-to-talk connection. Upon receipt of a push-to-talk origination message from a first remote unit, the first base station transmits an immediate response to the first remote unit, instructing it to communicate through the first set of equipment and the second set of allocated equipment.
摘要翻译： 在即按即说调度系统中，提供对即按即说发起消息的加速响应的方法和装置。 第一基站分配第一组设备以支持即按即说连接。 第一系统控制器分配第二组设备以支持即按即说连接。 在从第一远程单元接收到即按即说发起消息时，第一基站向第一远程单元发送即时响应，指示其通过第一组设备和第二组分配的设备进行通信。
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4.发明授权Method and apparatus for providing a cone of silence in a cellular communication system 失效用于在蜂窝通信系统中提供静音锥的方法和装置
公开(公告)号：US5828661A
公开(公告)日：1998-10-27
申请号：US651368
申请日：1996-05-22
CPC分类号： H04W36/0055 , H04W16/32 , H04W48/12
摘要： In a communications network, a remote unit communicates with another user via at least one base station. The network has a plurality of base stations controlled by a mobile switching center. Each base station of the plurality of base stations transmits an identifying pilot signal. To defining an area in which communication between a set of the base stations and the remote unit is forbidden, an auxiliary antenna transmits a silent region identifying pilot signal. The remote unit measures a signal strength of a set of identifying pilot signals corresponding to a neighbor set of base stations and measures a signal strength of the silent region identifying pilot signal. The remote unit sends a pilot strength measurement report to the mobile switching center via a first base station with which the remote unit has established communication. A handoff of the established communication between the remote unit and the first base station is initiated if the pilot strength measurement report comprises an entry corresponding to the silent region identifying pilot signal.
摘要翻译： 在通信网络中，远程单元经由至少一个基站与另一用户进行通信。 网络具有由移动交换中心控制的多个基站。 多个基站中的每个基站发送识别导频信号。 为了定义禁止一组基站和远程单元之间的通信的区域，辅助天线发送无声区域识别导频信号。 远程单元测量与基站的相邻集合相对应的一组识别导频信号的信号强度，并测量无声区域识别导频信号的信号强度。 远程单元经由与远程单元建立通信的第一基站向移动交换中心发送导频强度测量报告。 如果导频强度测量报告包括与静音区域识别导频信号相对应的条目，则启动远程单元和第一基站之间建立的通信的切换。
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5.发明授权Pulse density modulation circuit (parallel to serial) comparing in a nonsequential bit order 失效脉冲密度调制电路（并行串行）以非顺序比特顺序进行比较
公开(公告)号：US5337338A
公开(公告)日：1994-08-09
申请号：US11618
申请日：1993-02-01
CPC分类号： H03M5/04
摘要： A pulse density modulation circuit has a counter which produces a most significant bit through a least significant bit output based on a clock input. The circuit also has a comparator with two sets of most significant bit through least significant bit inputs that produces an output based on a comparison of the two sets of inputs. The first set of comparator most significant bit through least significant bit inputs receives respectively a most significant bit through a least significant bit of an input reference signal. The second set of comparator most significant bit through least significant bit inputs receives the counter most significant bit through least significant bit output in a non-sequential bit order. The non-sequential bit order can be a bit reversed order wherein the counter most significant bit through least significant bit output are respectively connected to the comparator least significant bit through most significant bit input. The circuit may further filter the comparator output to provide a resultant analog output signal.
摘要翻译： 脉冲密度调制电路具有基于时钟输入通过最低有效位输出产生最高有效位的计数器。 该电路还具有比较器，其具有两组最高有效位通过最低有效位输入，其基于两组输入的比较产生输出。 第一组比较器最高有效位通过最低有效位输入通过输入参考信号的最低有效位分别接收最高有效位。 第二组比较器最高有效位通过最低有效位输入以非顺序位顺序通过最低有效位输出接收计数器最高有效位。 非顺序位顺序可以是位反转顺序，其中通过最低有效位输出的计数器最高有效位分别通过最高有效位输入连接到比较器最低有效位。 电路可以进一步对比较器输出进行滤波以提供合成的模拟输出信号。
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6.发明授权Temperature-compensated gain-controlled amplifier having a wide linear dynamic range 失效具有宽线性动态范围的温度补偿增益控制放大器
公开(公告)号：US5408697A
公开(公告)日：1995-04-18
申请号：US76228
申请日：1993-06-14
摘要： A high dynamic range linear automatic gain control (AGC) circuit that has independent means for temperature compensation. The temperature compensation circuit of this invention can be used in a closed-loop AGC circuit such as is required in a transceiver for compensating the gains of receiver and transmitter amplifiers to ensure that both track closely over ranges of temperature, frequency and load impedance. The temperature compensation signal is coupled to one of the two gates in a field effect transistor (FET) amplifier to maintain a constant gain function over ranges of temperature, frequency and load impedance. Thermal compensation for the transmitter amplifier is derived from the thermal compensation signal for the receiver amplifier.
摘要翻译： 高动态范围线性自动增益控制（AGC）电路，具有独立的温度补偿装置。 本发明的温度补偿电路可以用在诸如收发器中所需的闭环AGC电路中，用于补偿接收机和发射机放大器的增益，以确保两个轨道紧密接近温度，频率和负载阻抗的范围。 温度补偿信号耦合到场效应晶体管（FET）放大器中的两个栅极中的一个，以在温度，频率和负载阻抗范围内保持恒定的增益函数。 发射机放大器的热补偿来自接收放大器的热补偿信号。
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7.发明授权Method and apparatus for multiplying a pulse modulated signal by an analog control signal 失效用于将脉冲调制信号乘以模拟控制信号的方法和装置
公开(公告)号：US5604459A
公开(公告)日：1997-02-18
申请号：US622180
申请日：1996-03-25
申请人： Katherine W. White
发明人： Katherine W. White
摘要： The present invention is a novel and improved method and apparatus of multiplying an analog signal by a pulse modulated signal. The apparatus includes a CMOS or equivalent gate. The pulse modulated signal is applied to the input of the gate. The analog control signal is applied to the power pin of the part. The output of the gate is the product of the two signals. The output may be lowpass filtered to obtain a resultant analog value. A scaling and offset circuit can be used to scale the output to comprise a zero pulse width modulation value wherein the value of the analog control signal has no affect on the resultant analog value.
摘要翻译： 本发明是通过脉冲调制信号对模拟信号进行乘法的新型改进方法和装置。 该装置包括CMOS或等效门。 脉冲调制信号被施加到门的输入端。 模拟控制信号被施加到部件的电源引脚。 门的输出是两个信号的乘积。 输出可以被低通滤波以得到合成的模拟值。 可以使用缩放和偏移电路来缩放输出以包括零脉冲宽度调制值，其中模拟控制信号的值对所得到的模拟值没有影响。
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