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91. 发明授权

EP0032253B1 Demodulator carrier recovery loop and method for demodulating a signal 失效
标题翻译：解调器载波恢复环路和解调信号的方法
公开(公告)号：EP0032253B1
公开(公告)日：1984-08-15
申请号：EP80108261.1
申请日：1980-12-31
申请人： E-SYSTEMS INC.
发明人： Scott, Lex Allen , Mosley, William Henry, Jr. , Andren, Carl Frank
IPC分类号： H04L27/22 , H04J3/02
CPC分类号： H04L27/2273 , H04L27/2332 , H04L2027/0057

92. 发明公开

EP0090134A1 Programmable fine frequency detector 失效
标题翻译：可编程精细频率检测器
公开(公告)号：EP0090134A1
公开(公告)日：1983-10-05
申请号：EP83100516.0
申请日：1983-01-21
申请人： E-SYSTEMS INC.
发明人： Jones, Gary Patrick , Larson, Myles Arlyn
IPC分类号： G01R23/15 , H04Q1/457
CPC分类号： G01R23/15 , H04Q1/457
摘要： A detector circuit (10) is programmed to produce an output signal when an input signal is at a predetermined frequency. The input signal is provided to an inverter (14) to produce an inverse signal. The input signal together with the inverse signal are provided to two switches (16,18). The switches (16,18) are driven by first and second drive signals produced by a drive generator (60). The output terminals (24,28) of the switches are alternately connected to the input terminals in synchronism with the corresponding drive signals. The output signals from the switches (16, 18) are transmitted through low pass filters (26, 30) and the resulting signals are combined to produce a summation signal by a summation circuit (36). The summation signal is passed through an absolute value circuit (40) to produce an absolute value signal. The absolute value signal is examined by a threshold detector circuit (44) which produces an output when the absolute value signal exceeds a preset threshold. An oscillator (52) provides a reference signal to a programmable divider (56) that produces a selected rate signal for the drive generator (60). The programmable divider (56) is set such that the selected rate signal produced thereby corresponds to the frequency of the input signal to be detected. A phase and frequency error detector circuit (60) is provided to form a feedback loop to monitor the output of the switches (16, 18) and drive the programmable divider (56) to produce a selected rate frequency signal which corresponds to the frequency of the input signal.
摘要翻译：检测器电路（10）被编程为当输入信号处于预定频率时产生输出信号。输入信号被提供给反相器（14）以产生反相信号。输入信号与反相信号一起提供给两个开关（16,18）。开关（16,18）由驱动发生器（60）产生的第一和第二驱动信号驱动。开关的输出端子（24,28）与相应的驱动信号同步地交替地连接到输入端子。来自开关（16,18）的输出信号通过低通滤波器（26,30）传输，并且合成信号被合成电路（36）合并以产生合计信号。求和信号通过绝对值电路（40）以产生绝对值信号。绝对值信号由阈值检测器电路（44）检测，该电路在绝对值信号超过预置阈值时产生输出。振荡器（52）向可编程分频器（56）提供参考信号，该分频器为驱动发生器（60）产生选定的速率信号。可编程分频器（56）被设置为使得由此产生的所选择的速率信号对应于待检测的输入信号的频率。提供相位和频率误差检测器电路（60）以形成反馈回路以监视开关（16,18）的输出并驱动可编程分频器（56）以产生选定的速率频率信号，该频率信号对应于输入信号。

93. 发明公开

EP0061564A1 Navigation system 失效
标题翻译：导航系统。
公开(公告)号：EP0061564A1
公开(公告)日：1982-10-06
申请号：EP82100387.8
申请日：1982-01-21
申请人： E-SYSTEMS INC.
发明人： Keearns, Larry Ray
IPC分类号： G01C21/00 , G06F15/50
CPC分类号： G01C21/005
摘要： Apparatus for determining the position and velocity of a vehicle over a given area as represented by stored data includes a radarterrain sensor (10) responding to radar pulse returns and generating video signals to a terrain clearance estimator (16). Also input to the terrain clearance estimator are vehicle vertical position data and vertical speed data which along with the video output of the terrain sensor generates by means of a time of arrival estimator observed clearance signals which are sampled and input to a buffer (24). Also stored in the buffer are vehicle position and velocity signals from an inertial navigation system (18) with the buffer data accessed by an error correction estimator (30). The error correction estimator responds to stored data to generate a sequence of position and velocity error correction signals each comprising three components. These error correction estimates of vehicle position and vehicle velocity are input to a data register (32) which is accessed by the inertial navigation system to provide update information on the position and velocity of a vehicle.

94. 发明公开

EP0020729A4 INDUCTORLESS MONOLITHIC CRYSTAL FILTER NETWORK. 失效
标题翻译：单片晶体滤波器网络无反应加速器。
公开(公告)号：EP0020729A4
公开(公告)日：1981-05-15
申请号：EP80900142
申请日：1980-06-17
申请人： E SYSTEMS INC
发明人： SWANSON THOMAS W , HERZIG PAUL A
IPC分类号： H03H3/02 , H03H9/54 , H03H9/56 , H03H9/58 , H03H9/60 , H03H9/205
CPC分类号： H03H9/542

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