公开(公告)号：US5670915A

公开(公告)日：1997-09-23

申请号：US644917

申请日：1996-05-24

Applicant: Russell E. Cooper ,  Scott Ellison

Inventor： Russell E. Cooper ,  Scott Ellison

IPC: H03K3/0231

CPC classification number: H03K3/0231

Abstract: An accurate RC oscillator circuit located within a microcontroller chip for generating a signal of a predetermined frequency that accurately oscillates between two precise voltage levels, i.e., a low voltage (VL) and a high voltage (VH) is disclosed. The oscillator circuit uses first and second comparators having their outputs respectively coupled to set and reset inputs of a flip flop. The output of the flip flop is coupled to a series RC network for controlling the charging and discharging of the voltage across a capacitor of the RC network. The interconnection of the series RC network is coupled to an input of both the first and second comparators. The other input of the first comparator is coupled to a circuit for applying a modified high threshold version (VH') of the high voltage such that the signal generated by the oscillator circuit does not exceed the precise high voltage (VH). Similarly, the other input of the second comparator is coupled to a circuit for applying a modified low threshold version (VL') of the low voltage such that the signal generated by the oscillator circuit does not fall below that precise low voltage (VL). Additionally, means are provided to select different input voltages for the low voltage (VL) such that the desired output frequency of the oscillator may be adjusted to accurately oscillate between the high voltage (VH) and the selected low voltage (VL).

Abstract translation: 公开了一种位于微控制器芯片内的精确RC振荡器电路，用于产生准确地在两个精确电压电平（即低电压（VL））和高电压（VH）之间振荡的预定频率的信号。 振荡器电路使用其输出的第一和第二比较器分别耦合到触发器的设置和复位输入。 触发器的输出耦合到串联RC网络，用于控制跨越RC网络的电容器的电压的充电和放电。 串联RC网络的互连耦合到第一和第二比较器的输入端。 第一比较器的另一输入端耦合到用于施加高电压的修改的高阈值版本（VH'）的电路，使得由振荡器电路产生的信号不超过精确的高电压（VH）。 类似地，第二比较器的另一输入端耦合到用于施加低电压的修改的低阈值版本（VL'）的电路，使得由振荡器电路产生的信号不会低于该精确低电压（VL）。 此外，提供了用于为低电压（VL）选择不同输入电压的装置，使得可以调节振荡器的期望输出频率以在高电压（VH）和所选择的低电压（VL）之间精确地振荡。

公开(公告)号：US5552751A

公开(公告)日：1996-09-03

申请号：US469176

申请日：1995-06-06

Applicant: Russell E. Cooper

Inventor： Russell E. Cooper

IPC: H03B5/32 ,  H03B5/06 ,  H03K3/012 ,  H03K3/354 ,  H03B5/36

CPC classification number: H03K3/3545 ,  H03K3/012

Abstract: An oscillator circuit (30, 40) for starting-up and operating at low voltages has been provided. The oscillator circuit includes an inverter circuit(31, 41) coupled across first and second terminals of a resonant circuit (14). The inverter circuit includes a push-pull driver stage having a P-channel transistor (18) and an N-channel transistor (20). The common drain electrodes of each are coupled to the second terminal of the resonant circuit. The source electrodes of the P- and N-channel transistors are respectively coupled to first and second supply voltage terminals. The gate electrode of the first transistor is coupled to the first terminal of resonant circuit. The inverter circuit further includes a circuit (32, 42) for shifting the voltage level applied to the gate electrode of the second transistor, relative to the voltage applied to the gate electrode of the first transistor, by a predetermined voltage. This has the effect of reducing the required operating voltage range of the inverter circuit while still maintaining both transistors active.

Abstract translation: 已经提供了用于在低电压下启动和操作的振荡器电路（30,40）。 振荡器电路包括耦合在谐振电路（14）的第一和第二端子上的反相器电路（31,41）。 逆变器电路包括具有P沟道晶体管（18）和N沟道晶体管（20）的推挽驱动级。 每个的公共漏电极耦合到谐振电路的第二端。 P沟道晶体管和N沟道晶体管的源电极分别耦合到第一和第二电源电压端子。 第一晶体管的栅电极耦合到谐振电路的第一端。 逆变器电路还包括用于将施加到第二晶体管的栅电极的电压相对于施加到第一晶体管的栅电极的电压移动预定电压的电路（32,42）。 这具有减少逆变器电路的所需工作电压范围同时仍保持两个晶体管有效的效果。

公开(公告)号：US6002356A

公开(公告)日：1999-12-14

申请号：US953374

申请日：1997-10-17

Applicant: Russell E. Cooper

Inventor： Russell E. Cooper

IPC: H03M1/36 ,  H03M1/00

CPC classification number: H03M1/002 ,  H03M1/365

Abstract: Flash analog-to-digital (A/D) conversion is performed with an n-bit converter using a resistive-divider string in which tap points are taken between each pair of adjacent resistors of the string as one input to each of a respective plurality of 2.sup.n -1 comparators. Each of the comparators has a second input in common with all of the other comparators at which an analog input voltage to be converted to digital form is applied. A transition point occurs at one of the tap points at which immediately adjacent ones of the comparators exhibit outputs of different binary states for a given a sample of the analog input voltage, signifying the transition point is occurring at the highest-order digital output at which the sampled analog input voltage exceeds a reference voltage. The transition point is detected during each sample, at a location within a group of consecutive ones of the comparators of preselected number considerably less than the total number of comparators in the converter. All of the comparators in the converter except those in the group containing the transition point are deactivated to conserve power during the conversion process for the given sample.

Abstract translation: 使用电阻分压器串，使用n位转换器执行闪存模数（A / D）转换，其中在串的每对相邻电阻器之间取出分接点作为相应多个的每一个的一个输入 的2n-1比较。 每个比较器具有与要转换成数字形式的模拟输入电压被应用的所有其它比较器共同的第二输入。 转换点出现在抽头点之一处，在这些点之间，相对于比较器的相邻的比较器显示给定的模拟输入电压的样本的不同二进制状态的输出，表示转换点出现在最高阶数字输出处 采样的模拟输入电压超过参考电压。 在每个采样期间，在预选数字的比较器的连续的一组中的位置处的转换点被检测到远小于转换器中的比较器的总数。 除了包含转换点的组中的转换器中的所有比较器都被去激活以在给定样品的转换过程中节省功率。

公开(公告)号：US5619430A

公开(公告)日：1997-04-08

申请号：US541666

申请日：1995-10-10

Applicant: James B. Nolan ,  Russell E. Cooper ,  Brian Dellacroce

Inventor： James B. Nolan ,  Russell E. Cooper ,  Brian Dellacroce

IPC: G01K7/01 ,  G05D23/19 ,  G06F11/30 ,  G06F15/78 ,  H02J7/00 ,  G06F9/22

CPC classification number: G05D23/1917 ,  G06F11/3024 ,  G06F11/3058 ,  G06F11/3093 ,  H02J7/0004

Abstract: A microcontroller for use in battery charging and monitoring applications is disclosed. The microcontroller includes a microprocessor and various front-end analog circuitry including a slope A/D converter and a multiplexer for allowing a plurality of analog input signals to be converted to corresponding digital counts indicative of signal level. The microcontroller further includes an on-chip temperature sensor, used in conjunction with the A/D converter, to monitor the temperature of the microcontroller. The temperature sensor generates and uses a differential voltage that is obtained across the base-emitter functions of two compatible bipolar transistors having dissimilar emitter areas. This differential voltage is proportional to temperature and may be sampled by the A/D converter to obtain a digital count indicative of the temperature of the microcontroller.

Abstract translation: 公开了一种用于电池充电和监视应用的微控制器。 微控制器包括微处理器和各种前端模拟电路，其包括斜率A / D转换器和多路复用器，用于允许将多个模拟输入信号转换成指示信号电平的相应数字计数。 微控制器还包括与A / D转换器结合使用的片上温度传感器，以监视微控制器的温度。 温度传感器产生并使用在具有不同发射极区域的两个兼容双极晶体管的基极 - 发射极功能之间获得的差分电压。 该差分电压与温度成比例，可以由A / D转换器采样，以获得指示微控制器温度的数字计数。

公开(公告)号：US5861861A

公开(公告)日：1999-01-19

申请号：US671575

申请日：1996-06-28

Applicant: James B. Nolan ,  Scott Ellison ,  Brian Boles ,  Rodney Drake ,  Russell E. Cooper

Inventor： James B. Nolan ,  Scott Ellison ,  Brian Boles ,  Rodney Drake ,  Russell E. Cooper

IPC: G02F1/133 ,  G06F3/147 ,  G09G3/00 ,  G09G3/18 ,  G09G3/36 ,  G09G5/00 ,  H02M3/07

CPC classification number: H02M3/07 ,  G06F3/147 ,  G09G3/18 ,  G09G3/006 ,  G09G3/3696 ,  G09G5/001

Abstract: Apparatus for providing multiple of discrete voltage levels to drive a liquid crystal display (LCD) from an LCD module on board a microcontroller chip includes a charge pump with a switched-capacitor that develops the discrete voltages as multiples of the value of a base voltage that remains substantially without change irrespective of change in the supply voltage. A switched-capacitor charging circuit selectively charges a capacitor to produce successive additive charges individually retrievable from the capacitor. An LCD drive selectively transmits the discrete voltage levels to activate the LCD according to status of an external system under the control of the microcontroller. Voltage losses that may occur during the switched-capacitor charging are compensated to maintain the levels of the discrete voltages free of decay. Compensation is achieved by overcharging the capacitor by an amount substantially equivalent to the amount of voltage loss on the capacitor, using active feedback obtained from monitoring the charge on the capacitor.

Abstract translation: 用于提供多个离散电压电平以从微控制器芯片上的LCD模块驱动液晶显示器（LCD）的装置包括具有开关电容器的电荷泵，其将离散电压开发为基本电压值的倍数 无论电源电压的变化如何，均保持基本无变化。 开关电容器充电电路选择性地对电容器充电以产生可从电容器单独检索的连续的附加电荷。 LCD驱动器根据微控制器的控制，根据外部系统的状态选择性地发送离散电压电平以激活LCD。 在开关电容器充电期间可能发生的电压损耗被补偿以保持离散电压的电平没有衰减。 通过使用从监视电容器上的电荷获得的有效反馈，使电容器过充电达到与电容器上的电压损失量相当的量。

公开(公告)号：US5565819A

公开(公告)日：1996-10-15

申请号：US499602

申请日：1995-07-11

Applicant: Russell E. Cooper

Inventor： Russell E. Cooper

IPC: H03K3/011 ,  H03K3/0231

CPC classification number: H03K3/011 ,  H03K3/0231

Abstract: An accurate RC oscillator circuit (10) for generating a signal of a predetermined frequency that accurately oscillates between two precise voltage levels, i.e., a low threshold voltage (V.sub.L) and a high threshold voltage (V.sub.H). The oscillator circuit uses first and second comparators (16, 18) having their outputs respectively coupled to set and reset inputs of a flip flop (20). The output of the flip flop is coupled to a series RC network for controlling the charging and discharging of the voltage across a capacitor (14) of the RC network. The interconnection (12) of the series RC network is coupled to an input of both the first and second comparators. The other input of the first comparator is coupled to a circuit (24) for applying a modified version (V'.sub.H) of the high threshold voltage such that the signal generated by the oscillator circuit does not exceed the precise high threshold voltage (V.sub.H). Likewise, the other input of the second comparator is coupled to a circuit (25) for applying a modified version (V'.sub.L) of the low threshold voltage such that the signal generated by the oscillator circuit does not fall below the precise low threshold voltage (V.sub.L).

Abstract translation: 一种用于产生准确地在两个精确电压电平（即低阈值电压（VL））和高阈值电压（VH）之间振荡的预定频率信号的精确RC振荡电路（10）。 振荡器电路使用其输出的第一和第二比较器（16,18）分别耦合到触发器（20）的设置和复位输入。 触发器的输出耦合到串联RC网络，用于控制跨越RC网络的电容器（14）的电压的充电和放电。 串联RC网络的互连（12）耦合到第一和第二比较器的输入端。 第一比较器的另一输入耦合到电路（24），用于施加高阈值电压的修正版本（V'H），使得由振荡器电路产生的信号不超过精确的高阈值电压（VH） 。 类似地，第二比较器的另一个输入耦合到电路（25），用于施加低阈值电压的修正版本（V'L），使得由振荡器电路产生的信号不会低于精确的低阈值电压 （VL）。