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31.发明授权Balun apparatus including impedance transformer having transformation length 失效包括具有变换长度的阻抗变压器的平衡 - 不平衡变压器
公开(公告)号：US5565881A
公开(公告)日：1996-10-15
申请号：US209811
申请日：1994-03-11
CPC分类号： H01P5/10
摘要： An electrical connection between a balanced circuit, such as a radio receiver and an unbalanced circuit, such as an antenna requires a balun. In a small electronic device such as a radiotelephone, a traditional balun is impractical because of the physical constraints. The balun function is performed by using a transmission line of minimum transverse dimensions and a predetermined length between the receiver and the antenna.
摘要翻译： 诸如无线电接收机的平衡电路和诸如天线的不平衡电路之间的电连接需要一个平衡 - 不平衡转换器。 在诸如无线电话的小型电子设备中，由于物理限制，传统的平衡 - 不平衡变换器是不切实际的。 通过使用接收器和天线之间的最小横向尺寸和预定长度的传输线来执行平衡 - 不平衡转换功能。
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32.发明授权
公开(公告)号：US5539360A
公开(公告)日：1996-07-23
申请号：US209336
申请日：1994-03-11
CPC分类号： H01P3/00 , H05K1/0237
摘要： A transmission line has a limited cross-section, a transmission line geometry and an improved characteristic impedance tolerance. The transmission line geometry utilizes a unique combination of broadside coupling and coplanar coupling with a reflector plate in order to improve the tolerance of the characteristic impedance. First, a larger coplanar gap is used to reduce the etching error. Second, the inner dielectric thickness sensitivities were also reduced by relying on broadside coupling and coplanar coupling to determine the characteristic impedance of the transmission line. Third, the effect of registration error in the broadside coupling is eliminated by rendering the two signal bearing conductors on the same layer.
摘要翻译： 传输线具有有限的横截面，传输线几何形状和改进的特性阻抗公差。 传输线几何结构利用了与反射板的宽边耦合和共面耦合的独特组合，以改善特性阻抗的公差。 首先，使用较大的共面间隙来减少蚀刻误差。 第二，通过依靠宽边耦合和共面耦合来确定传输线的特性阻抗，也降低了内部介质厚度的灵敏度。 第三，通过使两个信号轴承导体在同一层上来消除宽边耦合中的配准误差的影响。
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33.发明授权Frequency control circuit, and associated method, for a receiver operative to receive signals-transmitted thereto in intermittent bursts 失效频率控制电路和相关联的方法，用于接收操作以接收以间歇脉冲串发射的信号的接收机
公开(公告)号：US5280644A
公开(公告)日：1994-01-18
申请号：US997267
申请日：1992-12-22
CPC分类号： H03D7/163 , H04B1/56 , H04W52/0241
摘要： A frequency control circuit, and associated method, for a receiver operative to receive a TDMA signal transmitted by a transmitter in a TDMA communication system. A first frequency detector generates a first frequency control signal. A second frequency detector, comprised of a portion of a decision-directed demodulator, generates a second frequency control signal. The first frequency control signal is utilized to effectuate frequency control when a signal is continuously received by the receiver, such as times immediately subsequent to initial powering of the receiver as the receiver becomes synchronized with the TDMA signal transmitted thereto. Onces a receiver becomes synchronized to the transmitter, the receiver need only be powered during intermittent time periods when the TDMA signal is transmitted to the receiver. The second frequency control signal is utilized to effectuate frequency control only after the receiver is synchronized with the transmitter to permit intermittent operation of the receiver, and the frequency differences between the signal transmitted to the receiver and a receiver-oscillator, oscillation frequency is less than a maximum level.
摘要翻译： 一种频率控制电路和相关联的方法，用于接收在TDMA通信系统中由发射机发送的TDMA信号的接收机。 第一频率检测器产生第一频率控制信号。 由决策导向解调器的一部分组成的第二频率检测器产生第二频率控制信号。 第一频率控制信号用于当接收机连续接收信号时实现频率控制，例如当接收机与发送到其的TDMA信号同步时，紧接在接收机的初始供电之后的时间。 接收机的接收器变得与发射机同步，当TDMA信号被发送到接收机时，接收机只需要在间歇时间段期间供电。 第二频率控制信号仅在接收机与发射机同步之后才能实现频率控制，以允许接收机的间歇操作，并且传输到接收机的信号与接收机振荡器之间的频率差异小于 最高水平。
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公开(公告)号：US5222078A
公开(公告)日：1993-06-22
申请号：US791807
申请日：1991-11-13
CPC分类号： H04B7/0802
摘要： The present patent application includes a discussion of a signal compensation apparatus (119). The apparatus is implemented in a digital radiotelephone (101) having diversity receivers (111, 113). The signal compensation apparatus utilizes three control loops and a branch selection switch circuit to substantially diminish the undesired gain and DC offset present in the selected received data signal. Portions of the apparatus are implemented in a digital signal processor (DSP) (249) for rapid adjustment of the control loops when switching to a different receiver branch.
摘要翻译： 本专利申请包括对信号补偿装置（119）的讨论。 该装置在具有分集接收器（111,113）的数字无线电话（101）中实现。 信号补偿装置利用三个控制回路和分支选择开关电路来显着地减少存在于所选择的接收数据信号中的不期望的增益和DC偏移。 该设备的部分在数字信号处理器（DSP）249中实现，用于当切换到不同的接收器分支时快速调整控制回路。
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