公开(公告)号：US20050007164A1

公开(公告)日：2005-01-13

申请号：US10912371

申请日：2004-08-05

Applicant: Michael Callahan

Inventor： Michael Callahan

IPC: H03B1/00 ,  H03K3/00 ,  H03K4/502 ,  H03K4/90 ,  H03K5/08 ,  H03K5/12 ,  H03K5/13 ,  H03K17/16

CPC classification number: H03K17/166 ,  H03K4/502 ,  H03K5/08 ,  H03K5/13

Abstract: Methods and structures for ensuring the highly linear discharge of a capacitor used for slew rate control of a power driving stage from a maximum voltage to a minimum supply voltage, such as ground. A voltage ramp generator uses a single cascoded current source to achieve the linear ramp-down.

公开(公告)号：US4904960A

公开(公告)日：1990-02-27

申请号：US335614

申请日：1989-04-10

Applicant: Mansour Izadinia ,  Tamas Szepesi

Inventor： Mansour Izadinia ,  Tamas Szepesi

IPC: H03K3/03 ,  H03K3/354 ,  H03K4/502

CPC classification number: H03K3/03 ,  H03K3/354 ,  H03K4/502

Abstract: A CMOS relaxation oscillator is disclosed employing a pair of capacitors and individual charging means. A noninverting amplifier comprising two cascaded inverters is provided with a transmission gate input circuit that alternately switches the amplifier input between the two capacitors. A pair of switches coupled respectively across the capacitors alternately discharge them. The resulting oscillator has a frequency determined by the capacitor charging periods. Accordingly, the frequency and duty cycle can be predetermined as desired. The circuit can also be made either power supply tunable or power supply independent.

Abstract translation: 公开了使用一对电容器和单独充电装置的CMOS弛豫振荡器。 包括两个级联的反相器的非反相放大器设置有传输栅极输入电路，其交替地切换两个电容器之间的放大器输入。 分别耦合在电容器两端的一对开关交替地放电。 所产生的振荡器具有由电容器充电周期确定的频率。 因此，可以根据需要预定频率和占空比。 该电路也可以是电源可调谐或电源独立的。

公开(公告)号：US4746842A

公开(公告)日：1988-05-24

申请号：US918416

申请日：1986-10-14

Applicant: Edward M. Ponte ,  Steven J. van Raalte ,  Dirk J. A. Teuling

Inventor： Edward M. Ponte ,  Steven J. van Raalte ,  Dirk J. A. Teuling

IPC: H03K4/501 ,  H03K4/50 ,  H03K4/502 ,  H04N3/223 ,  H04N3/27 ,  H04N5/12 ,  H01J29/70 ,  H01J29/76

CPC classification number: H03K4/502

Abstract: A circuit arrangement for generating a sawtooth-shaped signal for the field deflection in a picture display device with an amplitude which is substantially independent of the field frequency is disclosed. The value of the sawtooth-shaped signal during the occurrence of a sampling pulse is compared with a reference value for generating a control signal controlling the slope of the sawtooth-shaped signal. To eliminate instability in amplitude, which might result from phase jitter of the incoming field synchronizing signal and might cause an interlace error, sampling pulses are applied whose repetition frequency is substantially equal to the nth part of the field frequency, where n is an integer which is larger than 1, preferably a small multiple of 2.

Abstract translation: 公开了一种电路装置，用于产生具有基本上与场频无关的幅度的图像显示装置中的场偏转的锯齿形信号。 将采样脉冲发生期间的锯齿形信号的值与用于产生控制锯齿形信号的斜率的控制信号的参考值进行比较。 为了消除振幅的不稳定性，这可能是由于入射场同步信号的相位抖动引起的，并且可能引起隔行扫描错误，施加采样脉冲，其重复频率基本上等于场频的第n部分，其中n是整数， 大于1，优选2的小倍数。

公开(公告)号：US4705961A

公开(公告)日：1987-11-10

申请号：US820590

申请日：1986-01-21

Applicant: Walter W. Ainsworth ,  Arthur J. Metz

Inventor： Walter W. Ainsworth ,  Arthur J. Metz

IPC: H03K4/502 ,  H03K4/08 ,  H03K4/84

CPC classification number: H03K4/502

Abstract: A programmable sweep generator for generating a linear ramp signal of different slopes in a predetermined step sequence is disclosed. The programmable sweep generator comprises a controllable voltage generator, a voltage-to-current converter, and integrator sections. The slopes of the ramp signal may be electronically controlled by switching the controllable voltage generator, voltage-to-current converter and timing capacitors in the integrator section. The use of independent buffer amplifiers, independent control circuits, and current steering devices for each timing capacitor eliminates the need to connect a switching element in series with each timing capacitor, thereby eliminating any error or non-linearity.

Abstract translation: 公开了一种用于以预定步骤序列产生不同斜率的线性斜坡信号的可编程扫描发生器。 可编程扫描发生器包括可控电压发生器，电压 - 电流转换器和积分器部分。 可以通过在积分器部分中切换可控电压发生器，电压 - 电流转换器和定时电容器来电子控制斜坡信号的斜率。 对于每个定时电容器使用独立的缓冲放大器，独立控制电路和电流转向装置消除了将开关元件与每个定时电容器串联的需要，从而消除任何错误或非线性。

公开(公告)号：US4607238A

公开(公告)日：1986-08-19

申请号：US681472

申请日：1984-12-13

Applicant: Cord H. Kohsiek

Inventor： Cord H. Kohsiek

IPC: H03K4/06 ,  H03K4/50 ,  H03K4/502 ,  H03K3/02

CPC classification number: H03K4/502

Abstract: In a monolithic integrated RC-oscillator comprising only one external frequency-determining network of a capacitance and a discharge circuit, a charging circuit which can be switched on and off periodically is connected to the network, which charging circuit is switched on and switched off by means of a threshold circuit with two switching thresholds when the voltage across the capacitor of the network reaches the lower and the upper switching threshold, respectively. In order to ensure that the frequency of the generated sawtooth signal is independent of a fixed discharge current, which is subject to spreading, and of the temperature coefficient of this current, the charging current of the charging circuit is controlled by the voltage across a second capacitor, which is charged or discharged with a current (I.sub.1) when the frequency-determining capacitance is discharged and which is discharged or charged with a second current when said frequency-determining capacitor is charged.

Abstract translation: 在只包含一个电容和放电电路的一个外部频率确定网络的单片集成RC振荡器中，可以周期性地接通和断开的充电电路连接到网络，该充电电路被接通并被 当网络电容器两端的电压分别达到下限和上限切换阈值时，具有两个切换阈值的阈值电路的装置。 为了确保产生的锯齿波信号的频率与固定的放电电流（其将被扩展）和该电流的温度系数无关，充电电路的充电电流由第二个电压 电容器，当频率确定电容放电时，用电流（I1）充电或放电，并且当所述频率确定电容器被充电时，其被放电或充电第二电流。

公开(公告)号：US4374366A

公开(公告)日：1983-02-15

申请号：US220606

申请日：1980-12-29

Applicant: Michael McGinn

Inventor： Michael McGinn

IPC: H03K3/023 ,  H03K3/0231 ,  H03K4/50 ,  H03K4/501 ,  H03K4/502 ,  H04N3/16

CPC classification number: H03K4/502

Abstract: A horizontal oscillator for a television receiver includes an on chip nitride capacitor. The circuit includes a reference current amplifier which generates a low temperature coefficient reference current. By varying the gain of a current mirror circuit, the reference current is split to produce a small charge/discharge current. A resistive bias chain and first and second capacitors are employed to fix the upper and lower peak voltages of the oscillator output ramp signal.

Abstract translation: 电视接收机的水平振荡器包括片上氮化物电容器。 该电路包括产生低温度系数参考电流的参考电流放大器。 通过改变电流镜电路的增益，将参考电流分开以产生小的充电/放电电流。 采用电阻偏压链和第一和第二电容器来固定振荡器输出斜坡信号的上限和下限峰值电压。

公开(公告)号：US3846827A

公开(公告)日：1974-11-05

申请号：US33153673

申请日：1973-02-12

Applicant: CAMBRIDGE RES & DEV GROUP

Inventor： EPPLER W

IPC: G10L21/04 ,  G11B5/00 ,  H03K4/502 ,  H03K7/08 ,  G11B5/02 ,  G11B27/18

CPC classification number: H03K7/08 ,  G10L21/04 ,  G11B5/00 ,  H03K4/502

Abstract: In an improved speech compressor which provides frequency transformation by passing speech signals through an analog shift register and controlling the shift rate of the register with a varying period, the control of the sample period and output blanking is improved by automatically initiating reset as soon as a zero crossing of the signal is detected within the enable blank interval. Thus, discard of information in the line and refilling of the line with the next initial portion of the sample signal will occur as soon as the detected zero crossing within the enable period blanks the output and the effective blanked period will thereby be shortened to the extent that a zero crossing is detected prior to the regular termination point of the ramp controlled voltage.

Abstract translation: 在改进的语音压缩器中，通过使语音信号通过模拟移位寄存器并且以变化的周期控制寄存器的移位速率来提供频率变换，通过自动启动复位来提高采样周期和输出消隐的控制 在使能空白间隔内检测到信号的过零点。 因此，一旦在使能期间内检测到的过零点消耗输出，就会发生线路中的信息的丢弃和对采样信号的下一个初始部分的重新填充的线，并且有效的消隐周期将因此被缩短到 在斜坡控制电压的正常终止点之前检测到过零点。

公开(公告)号：US3514632A

公开(公告)日：1970-05-26

申请号：US3514632D

申请日：1967-10-05

Applicant: IBM

Inventor： HENDERSON JAMES W ,  PRYMAK LEONARD

IPC: H03K4/502 ,  H03K4/58 ,  H03K4/00

CPC classification number: H03K4/502 ,  H03K4/58

公开(公告)号：US3156875A

公开(公告)日：1964-11-10

申请号：US11717661

申请日：1961-06-14

Applicant: IBM

Inventor： FIORINO BENJAMIN C ,  ALFRED BRUNSCHWEIGER

IPC: H03K4/502

CPC classification number: H03K4/502

公开(公告)号：US11796606B2

公开(公告)日：2023-10-24

申请号：US17509836

申请日：2021-10-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Aniruddha Roy ,  Nitin Agarwal ,  Preetham Narayana Reddy

IPC: G01R31/52 ,  H03B5/12 ,  H03K3/0231 ,  H03K4/502

CPC classification number: G01R31/52 ,  H03B5/1203 ,  H03K3/0231 ,  H03K4/502

Abstract: In an example, a system includes an oscillator circuit on a chip. The oscillator circuit includes a charging current generator including a current mirror and an amplifier, where the amplifier is coupled to a pin on the chip, and where the pin is adapted to be coupled to an external resistor, where the external resistor is external to the chip. The oscillator circuit also includes oscillator circuitry coupled to the charging current generator, where the oscillator circuitry includes a comparator, a phase generator, a first capacitor coupled to a first switch, and a second capacitor coupled to a second switch. The oscillator circuit includes leakage circuitry coupled to the current mirror, where the leakage circuitry is configured to draw a current from the current mirror proportional to a leakage current flowing through the external resistor from circuitry internal to the chip.