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81. 发明授权

US5477174A Ramp generator 失效
标题翻译：斜坡发电机
公开(公告)号：US5477174A
公开(公告)日：1995-12-19
申请号：US369157
申请日：1995-01-05
申请人： Paul H. Capener , David S. Farrance
发明人： Paul H. Capener , David S. Farrance
IPC分类号： H03K4/00 , H03K4/501 , H03K4/56 , H03K4/06 , G06G7/64
CPC分类号： H03K4/00 , H03K4/501 , H03K4/56
摘要： A ramp generator has an integrator, which provides a ramp output, and a counter, which counts a clock signal during the rise period. The counter and clock are arranged so that when the actual rise time is equal to the desired rise time, the counter overflows and returns to zero. If the rise time is too slow, the counter will contain a count at the end of the rise period. A register is connected to receive this count and an adder adds the contents of the register to the contents of the adder repeatedly each time a clock pulse is generated. The adder has an output connected to the input of the integrator and, each time the adder overflows, supplies a correction pulse to the integrator so that its rise rate is increased.
摘要翻译：斜坡发生器具有提供斜坡输出的积分器和在上升期间对时钟信号进行计数的计数器。计数器和时钟被布置成使得当实际上升时间等于期望的上升时间时，计数器溢出并返回到零。如果上涨时间太慢，计数器将在上升期结束时包含一个计数。连接寄存器以接收该计数，并且每当产生时钟脉冲时，加法器将反相器将寄存器的内容重复加到加法器的内容。加法器具有连接到积分器的输入的输出，并且每加一个溢出时，向积分器提供校正脉冲，使其上升速率增加。

82. 发明授权

US4626702A Saw-tooth wave generating circuit 失效
标题翻译：锯齿波发生电路
公开(公告)号：US4626702A
公开(公告)日：1986-12-02
申请号：US675335
申请日：1984-11-27
申请人： Yasuo Chito
发明人： Yasuo Chito
IPC分类号： H03K4/501 , H03K3/011 , H03K4/08 , H03K4/50 , H03K4/90
CPC分类号： H03K3/011 , H03K4/50
摘要： A saw-tooth wave generating circuit is formed by providing a constant current source with negative feedback through an operational amplifier. The operational amplifier compares a reference voltage with the voltage across a resistor through which a current of the constant current source is flowing, to produce a control voltage for the constant current source. The saw-tooth wave is generated across a capacitor which is charged by the constant current source and is discharged through a transistor which receives a periodic pulse signal.
摘要翻译：通过通过运算放大器提供具有负反馈的恒定电流源来形成锯齿波产生电路。运算放大器将参考电压与恒定电流源的电流流经电阻的电压进行比较，以产生用于恒流源的控制电压。锯齿波在由恒流源充电的电容器上产生，并通过接收周期脉冲信号的晶体管放电。

83. 发明授权

US4429281A Integrator for a switched capacitor-filter 失效
标题翻译：用于开关电容滤波器的积分器
公开(公告)号：US4429281A
公开(公告)日：1984-01-31
申请号：US213399
申请日：1980-12-05
申请人： Akihiko Ito , Kazuhiro Kobayashi , Hisami Tanaka , Norio Ueno
发明人： Akihiko Ito , Kazuhiro Kobayashi , Hisami Tanaka , Norio Ueno
IPC分类号： H03K4/501 , G06G7/186 , H03H19/00 , H03K4/56 , H03K5/00 , H03F1/00
CPC分类号： H03H19/004 , G06G7/1865
摘要： An integrator for use in a switched capacitor-filter, in which switching elements are connected to an input and to an output of an operational amplifier included in the integrator for clamping the input and output to a ground potential during suspension of the integral operation, in order to prevent potentials at the input and output of the operational amplifier from varying and hence ensure rapid stabilization of the integral operation of the integrator.
摘要翻译：一种用于开关电容滤波器的积分器，其中开关元件连接到积分器中包括的输入端和运算放大器的输出端，用于在积分操作暂停期间将输入和输出钳位到地电位，以防止运算放大器的输入和输出的电位变化，从而确保积分器的积分运算的快速稳定。

84. 发明授权

US4230998A Television vertical ramp generator 失效
公开(公告)号：US4230998A
公开(公告)日：1980-10-28
申请号：US18363
申请日：1979-03-07
申请人： Adel A. A. Ahmed
发明人： Adel A. A. Ahmed
IPC分类号： H03K4/501 , H03K4/72 , H03K4/90 , H03K3/282
CPC分类号： H03K4/501 , H03K4/72 , H03K4/90
摘要： A vertical sawtooth generator adaptable for integrated circuit application self-oscillates under control of a latch circuit. A circuit controls the linearity of the charging capacitor ramp voltage. High frequency components of the recurrent ramp occurring due to the retrace discharge current are reduced by controlling the discharge currents. The ramp rate is controlled by a single resistor external to an integrated circuit.

85. 发明授权

US4025867A Capacitance magnification circuit 失效
标题翻译：电容放大电路
公开(公告)号：US4025867A
公开(公告)日：1977-05-24
申请号：US696641
申请日：1976-06-16
申请人： Harold Seidel
发明人： Harold Seidel
IPC分类号： H03K4/501 , G06G7/18 , G06G7/186 , H03H11/48 , H03K4/08 , H03F1/36 , H03K5/00
CPC分类号： H03K4/08 , G06G7/18 , G06G7/186 , H03H11/483
摘要： A capacitance magnification circuit comprising an amplifier having a positive gain G, a first capacitor having a value C1, and a second capacitor having a value C2. The first capacitor is connected between the input port of the amplifier and an input port of the circuit, the second capacitor is connected between the input and output ports of the amplifier, and the output port of the amplifier is connected to an output port of the circuit. An effective capacitance value C1.sup.2 /.delta. is realized when the condition (G-1)C2-C1=.delta. is satisfied, where .delta. is an arbitrarily small positive value.
摘要翻译：一种电容倍率电路，包括具有正增益G的放大器，具有值C1的第一电容器和具有值C2的第二电容器。第一电容器连接在放大器的输入端口和电路的输入端口之间，第二电容器连接在放大器的输入和输出端口之间，放大器的输出端口连接到电路。当满足条件（G-1）C2-C1 = delta时，实现有效电容值C12 / delta，其中δ是任意小的正值。

86. 发明授权

US4009398A Sawtooth wave form circuit 失效
标题翻译：锯齿波形电路
公开(公告)号：US4009398A
公开(公告)日：1977-02-22
申请号：US582192
申请日：1975-05-30
申请人： Kouichi Yamada , Tatsuo Mizota , Kiyoshi Takeda , Kunio Aoki
发明人： Kouichi Yamada , Tatsuo Mizota , Kiyoshi Takeda , Kunio Aoki
IPC分类号： H03K4/501 , A63F3/02 , H03K4/06 , H03K4/94 , H03K4/08 , H03K4/48
CPC分类号： H03K4/94 , H03K4/06 , A63F2003/00719
摘要： A sawtooth wave forming circuit has an input signal alternately applied to the bases of first and a second transistors forming a differential amplifier, and a circuit which permits flow of a current equal to or proportional to the current flowing in the collector of the first transistor is connected between the differential amplifier and a power source. A capacitor is provided between ground and the junction between the circuit and differential amplifier. With this arrangement, the charge-discharge cycle of the capacitor is controlled by means of the input signal.By making use of the sawtooth wave forming circuit constituted in this way, stable trapezoidal or triangular waves having only small fluctuations in the slopes of the sides of the wave can be formed.
摘要翻译：锯齿波形成电路具有交替施加到形成差分放大器的第一和第二晶体管的基极的输入信号，并且允许流过与在第一晶体管的集电极中流动的电流成比例的电流的电路是连接在差分放大器和电源之间。地之间和电路与差分放大器之间的结点之间提供电容。通过这种布置，电容器的充放电循环通过输入信号进行控制。

87. 发明授权

US3986143A Sawtooth generator having a wide frequency variation range 失效
标题翻译：锯齿波发生器具有宽的频率变化范围
公开(公告)号：US3986143A
公开(公告)日：1976-10-12
申请号：US611973
申请日：1975-09-10
申请人： Karl-Dieter Nutz
发明人： Karl-Dieter Nutz
IPC分类号： H03K4/501 , H03K3/26 , H03K4/08
CPC分类号： H03K4/501
摘要： An improved sawtooth generator of the type in which a capacitor is charged slowly from a constant current source and discharged rapidly via a circuit including first and second mutually complementary transistors with the first transistor having its emitter connected to the capacitor and controlled by the capacitor voltage, its base connected to a first reference voltage and to the collector of the second transistor, and its collector connected to the base of the second transistor, and with the emitter of the second transistor being connected to ground. A wide frequency variation range for the above sawtooth generator is realized by the provision of a complementary auxiliary pair of transistors including a third and a fourth transistor. The third transistor has its base connected to the emitter of the first transistor, its collector connected to the base of the fourth transistor and its emitter connected to a second reference voltage, while the fourth transistor has its collector connected to the collector of the first transistor and its emitter connected to ground.
摘要翻译：一种改进的锯齿波发生器，其中电容器从恒流源缓慢充电并经由包括第一和第二互补晶体管的电路迅速放电，第一晶体管的发射极连接到电容器并由电容器电压控制，其基极连接到第一参考电压并连接到第二晶体管的集电极，并且其集电极连接到第二晶体管的基极，并且第二晶体管的发射极连接到地。通过提供包括第三和第四晶体管的互补的辅助辅助对，实现了上述锯齿波发生器的宽频率变化范围。第三晶体管的基极连接到第一晶体管的发射极，其集电极连接到第四晶体管的基极，其发射极连接到第二参考电压，而第四晶体管的集电极连接到第一晶体管的集电极其发射极接地。

88. 发明授权

US3824494A Temperature stable relaxation oscillator having controllable output frequency 失效
标题翻译：具有可控输出频率的温度稳定放松振荡器
公开(公告)号：US3824494A
公开(公告)日：1974-07-16
申请号：US36838173
申请日：1973-06-08
申请人： MOTOROLA INC
发明人： WILCOX M
IPC分类号： H03K4/50 , H03K3/02 , H03K4/501 , H03K4/90 , H03L7/099 , H03B5/24
CPC分类号： H03L7/099 , H03K4/501
摘要： The disclosed oscillator configuration is suitable for being provided in monolithic integrated circuit form and provides a sawtooth output signal having a repetition rate which is controllable and which is substantially independent of temperature variation. The oscillator circuit includes a comparator which senses the voltage across a discrete timing capacitor and switches states to control the charge and discharge of the capacitor. The oscillator configuration insures that no conductive semiconductor devices are connected to the timing capacitor during the relatively long charge time of the capacitor and that all transistors connected to the capacitor during the short discharge time are saturated to minimize the effects of the thermal changes of the active devices on the capacitor charge and discharge times. Moreover, the oscillator circuit requires only two power supply levels and one timing control terminal to facilitate its use in minimum lead integrated circuit packages including other circuits.
摘要翻译：所公开的振荡器配置适于以单片集成电路形式提供，并且提供具有可控制的重复率并且基本上与温度变化无关的锯齿波输出信号。振荡器电路包括一个比较器，用于检测分立定时电容器两端的电压，并切换状态以控制电容器的充电和放电。振荡器配置确保在电容器的相对长的充电时间期间不将导电半导体器件连接到定时电容器，并且在短放电时间期间连接到电容器的所有晶体管都被饱和以最小化活动的热变化的影响器件上的电容充放电次数。此外，振荡器电路仅需要两个电源电平和一个定时控制端子，以便于其在包括其他电路的最小引线集成电路封装中使用。

89. 发明授权

US3659115A Linear sweep circuit 失效
标题翻译：线性扫描电路
公开(公告)号：US3659115A
公开(公告)日：1972-04-25
申请号：US3659115D
申请日：1970-03-09
申请人： BOEING CO
发明人： MONTGOMERY GARY D
IPC分类号： H03K4/50 , H03K4/501 , H03K4/58
CPC分类号： H03K4/50 , H03K4/501 , H03K4/58
摘要： A logic controlled sweep circuit effecting high linearity over a wide range of sweep frequencies. A timing capacitor charging circuit is coupled to the gate electrode of a field effect transistor, and a Schmitt trigger logic circuit responsive to the sweep output signal at the source of the field effect transistor provides a reset pulse to a J-K flip-flop circuit to discharge the timing capacitor and control the sweep output signal.
摘要翻译：一个逻辑控制的扫描电路在宽的扫频范围内实现高线性度。定时电容器充电电路耦合到场效应晶体管的栅极，并且响应于场效应晶体管源极处的扫描输出信号的施密特触发逻辑电路为JK触发器电路提供复位脉冲以放电定时电容并控制扫描输出信号。

90. 发明授权

US3568077A Pseudo voltage controlled oscillator 失效
标题翻译： PSEUDO电压控制振荡器
公开(公告)号：US3568077A
公开(公告)日：1971-03-02
申请号：US3568077D
申请日：1968-09-03
申请人： NORTHROP CORP
发明人： FUJIMOTO YOSHIAKI
IPC分类号： G01S5/10 , G01S1/30 , G06G7/186 , H03C3/00 , H03K4/501 , H03K5/00 , H03K5/04 , H03K7/04 , H03K7/08 , H03L7/06 , H03B3/04
CPC分类号： H03K7/04 , G01S1/30 , G06G7/1865 , H03C3/00 , H03K4/501 , H03K5/00 , H03K5/04
摘要： For use in a VLG navigation system, such as the Omega Navigation system, a phase tracking loop in a receiver receives incoming signals from transmitting stations. The tracking loop contains four electronically controlled pseudo voltage-controlled oscillators, to eliminate the need for all but one master crystal oscillator, whose outputs provide necessary signals within the receiver. The pseudo oscillator comprises an integrator and a voltage-to-phase converter using an external clock pulse input and suitable control logic. The voltage-to-phase converter comprises a one-shot multivibrator in which the delay time is proportional to the input signal level. Thus, the periods between return times of the one-shot multivibrator to its original state provide a frequency which is controlled by input voltage level. When the phase-shift range exceeds + OR - 90* , the trigger pulse to the one-shot multivibrator is advanced or delayed, and the integrator is reset to zero.

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