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1. 发明授权

US5886547A Circuit and method of controlling mixer linearity 失效
标题翻译：电路和控制混频器线性的方法
公开(公告)号：US5886547A
公开(公告)日：1999-03-23
申请号：US771348
申请日：1996-12-16
申请人： Jeffrey C. Durec , William E. Main
发明人： Jeffrey C. Durec , William E. Main
IPC分类号： H03D7/12 , H03D7/14 , H04B1/10 , H04B1/28
CPC分类号： H04B1/109 , H03D7/1408 , H03D7/1433 , H03D7/1491 , H03D2200/0025 , H03D7/12
摘要： An integrated receiver circuit (10) has a first amplifier (12) coupled for receiving a radio frequency (RFIN) input signal. A mixer (16) has an RF input coupled to an output of the first amplifier, a local oscillator (LO) input coupled for receiving an LO signal, and an output for providing an intermediate frequency (IF) signal. A second amplifier (20) has an input coupled for receiving the IF signal, and an output for providing a receive signal strength indicator (RSSI) signal representative of an input power level of the receiver signal path. A feedback circuit (22-26 or 72, 78) is coupled between the first output of the second amplifier and a linearity control input of the mixer for controlling linearity of the mixer.
摘要翻译：集成接收器电路（10）具有耦合用于接收射频（RFIN）输入信号的第一放大器（12）。混频器（16）具有耦合到第一放大器的输出的RF输入，耦合用于接收LO信号的本地振荡器（LO）输入端和用于提供中频（IF）信号的输出。第二放大器（20）具有耦合用于接收IF信号的输入和用于提供表示接收机信号路径的输入功率电平的接收信号强度指示符（RSSI）信号的输出。反馈电路（22-26或72,78）耦合在第二放大器的第一输出端和混频器的线性控制输入端之间，用于控制混频器的线性度。

2. 发明授权

US4926132A FM detector with reduced distortion 失效
标题翻译： FM检测器具有减少的失真
公开(公告)号：US4926132A
公开(公告)日：1990-05-15
申请号：US399792
申请日：1989-08-28
申请人： William E. Main
发明人： William E. Main
IPC分类号： H03D3/06 , H03D3/00 , H03D3/02
CPC分类号： H03D3/001 , H03D3/02
摘要： An FM detection circuit utilizes a first multiplier and phase shift circuit to demodulate an FM signal. The output signal also contains harmonic distortion as a result of the demodulation process. A gain control circuit is included to provide a first gain control signal to the first multiplier which adjusts the magnitude of the output signal of the FM detection circuit in such a manner as to substantially eliminate the harmonic distortion. The gain control circuit uses a second multiplier to generate an output signal proportional to the square of the output signal of the phase shift circuit which is then compared to a constant current to produce an error signal proportional to the harmonic distortion. The error signal controls the magnitude of the first gain control signal such that the output signal of the FM detection circuit is proportional to the deviation of the FM signal from its center frequency.

3. 发明授权

US4567441A Circuit and method for linearizing the output signal of an FM detector 失效
标题翻译：用于线性化FM检测器的输出信号的电路和方法
公开(公告)号：US4567441A
公开(公告)日：1986-01-28
申请号：US595871
申请日：1984-04-02
申请人： William E. Main
发明人： William E. Main
IPC分类号： H03D3/00 , H03D3/06
CPC分类号： H03D3/001 , H03D3/06
摘要： An output load circuit having a non-linear transfer characteristic is coupled to the differential output of a conventional quadrature detector which produces a more linear version of the S-curve characteristics of the detector. The load circuit comprises differentially connected transistors each having their collector-emitter paths coupled to respective outputs of the multiplied portion of the quadrature demodulator wherein the non-linear differential output signal therefrom drives the non-linear transfer function of the base-emitter junction of the differentially coupled transistors to produce a linear output voltage at the base thereof.
摘要翻译：具有非线性传递特性的输出负载电路耦合到常规正交检测器的差分输出，其产生检测器的S曲线特性的更线性版本。负载电路包括差分连接的晶体管，每个晶体管的集电极 - 发射极路径耦合到正交解调器的相乘部分的相应输出端，其中来自其的非线性差分输出信号驱动基极 - 发射极结的非线性传递函数差分耦合晶体管，以在其基极处产生线性输出电压。

4. 发明授权

US5754038A Method and circuit for current regulation 失效
标题翻译：电流调节方法和电路
公开(公告)号：US5754038A
公开(公告)日：1998-05-19
申请号：US706879
申请日：1996-09-03
申请人： Jeffrey C. Durec , William E. Main
发明人： Jeffrey C. Durec , William E. Main
IPC分类号： G05F3/22 , G05F3/20
CPC分类号： G05F3/222
摘要： A current regulator (60, 90, and 100) provides current regulation. The current regulator (60, 90, and 100) has a bias generator (14) which compares a generated voltage, V.sub.ref, with a feedback voltage generated in accordance with an output current provided in a reference circuit (57, 58, and 59). The current regulator (60, 90, and 100) operates as a bias circuit to minimize the quiescent currents for efficiently providing regulated output currents in current sink circuit (26). The current in the bias generator (14) and the current in the reference circuit (57, 58, and 59) that regulate the output current in current sink circuit (26) are a small percentage of the overall current.
摘要翻译：电流调节器（60,90和100）提供电流调节。电流调节器（60,90和100）具有偏置发生器（14），其将产生的电压Vref与根据在参考电路（57,58和59）中提供的输出电流产生的反馈电压进行比较，。电流调节器（60,90和100）用作偏置电路以最小化静态电流，以有效地提供电流吸收电路（26）中的调节输出电流。偏置发生器（14）中的电流和调节电流吸收电路（26）中的输出电流的参考电路（57,58和59）中的电流是总电流的一小部分。

5. 发明授权

US5617056A Base current compensation circuit 失效
标题翻译：基极电流补偿电路
公开(公告)号：US5617056A
公开(公告)日：1997-04-01
申请号：US498038
申请日：1995-07-05
申请人： William E. Main , David K. Lovelace , Jesus S. Pena-Finol
发明人： William E. Main , David K. Lovelace , Jesus S. Pena-Finol
IPC分类号： G05F3/26 , G05F1/10
CPC分类号： G05F3/265
摘要： A base current compensation circuit (10) generates a current that tracks a gain of a transistor (11). The compensation circuit (10) includes a current mirror formed by a mirror transistor (12) and an output transistor (14). The mirror transistor (12) is connected to the transistor (11) whose gain is tracked. A current source (16) and a feedback transistor (13) causes the mirror transistor (12) to draw a base current from the transistor (11) so that a collector current of the transistor (11) matches a reference current. The output transistor (14) amplifies the base current of the transistor (11) to generate the tracking current in the collector electrode of the output transistor (14).
摘要翻译：基极电流补偿电路（10）产生跟踪晶体管（11）的增益的电流。补偿电路（10）包括由镜晶体管（12）和输出晶体管（14）形成的电流镜。镜晶体管（12）连接到其增益被跟踪的晶体管（11）。电流源（16）和反馈晶体管（13）使得反射镜晶体管（12）从晶体管（11）抽取基极电流，使得晶体管（11）的集电极电流与参考电流相匹配。输出晶体管（14）放大晶体管（11）的基极电流，以在输出晶体管（14）的集电极中产生跟踪电流。

6. 发明授权

US4958122A Current source regulator 失效
标题翻译：电流源调节器
公开(公告)号：US4958122A
公开(公告)日：1990-09-18
申请号：US452080
申请日：1989-12-18
申请人： William E. Main
发明人： William E. Main
IPC分类号： G05F3/22
CPC分类号： G05F3/225
摘要： A current source regulator is responsive to an enable signal and provides at least one output current of predetermined magnitude proportional to absolute temperature. The enable signal biases a first transistor for supplying current through its collector-emitter conduction path to the common base of a string of PNP transistors, the latter of which provide the output current. The current flowing in one of the PNP transistors flows through a regulating feedback circuit, the output of which regulates the base voltage of the first transistor to control the base voltage of the PNP transistors for maintaining the current flowing through the regulating feedback circuit at the predetermined value proportional to absolute temperature.
摘要翻译：电流源调节器响应于使能信号并且提供与绝对温度成比例的预定大小的至少一个输出电流。使能信号偏置用于通过其集电极 - 发射极传导路径提供电流到PNP晶体管串的公共基极的第一晶体管，后者提供输出电流。在一个PNP晶体管中流动的电流流经调节反馈电路，其调节反馈电路调节第一晶体管的基极电压，以控制PNP晶体管的基极电压，以将流过调节反馈电路的电流保持在预定的值与绝对温度成正比。

7. 发明授权

US4928068A FM demodulator 失效
标题翻译： FM解调器
公开(公告)号：US4928068A
公开(公告)日：1990-05-22
申请号：US345816
申请日：1989-05-01
申请人： William E. Main
发明人： William E. Main
IPC分类号： H03D3/00 , H03D3/24
CPC分类号： H03D3/24
摘要： An FM demodulator circuit uses an oscillator to provide a switch control signal synchronized to an FM signal, and a current supply to provide differentially alternating currents at first and second outputs flowing through a commutator circuit to the first and second outputs of the FM demodulator circuit. The commutator circuit is responsive to the switch control signal for alternately switching the first and second outputs of the current supply between the first and second outputs of the FM demodulator circuit thereby providing an alternating current flowing in the first and second outputs of the FM demodulator circuit which has an average value over each half cycle of the switch control signal proportional to the deviation of the frequency of the FM signal from the free-running frequency of the oscillator.

8. 发明授权

US4808907A Current regulator and method 失效
标题翻译：电流调节器和方法
公开(公告)号：US4808907A
公开(公告)日：1989-02-28
申请号：US194752
申请日：1988-05-17
申请人： William E. Main
发明人： William E. Main
IPC分类号： G05F1/56 , G05F3/22 , G05F3/20
CPC分类号： G05F1/561 , G05F3/22
摘要： An integrated circuit for providing a regulated output current comprises an output transistor for producing the output current, a feedback circuit including a current mirror for sensing the magnitude of the output current and providing a feedback current proportional thereto and a driver circuit for comparing the feedback current to an externally generated current and biasing the output transistor accordingly to regulate the magnitude of the output current to a predetermined value. Preferably, the external current is generated through an external resistor coupled to an input of the driver curcuit and the current mirror wherein the magnitude of the external current is directly proportional to a reference voltage provided on chip and applied to an additional input of the driver circuit the latter of which functions as an operational amplifier.
摘要翻译：用于提供调节的输出电流的集成电路包括用于产生输出电流的输出晶体管，包括用于感测输出电流的大小并提供与其成比例的反馈电流的电流镜的反馈电路和用于比较反馈电流的驱动电路到外部产生的电流并且相应地偏置输出晶体管以将输出电流的幅度调节到预定值。优选地，通过耦合到驱动器电路和电流镜的输入的外部电阻器产生外部电流，其中外部电流的大小与芯片上提供的参考电压成正比并且施加到驱动器电路的附加输入后者用作运算放大器。

9. 发明授权

US06407615B2 Temperature compensation circuit and method of compensating 失效
标题翻译：温度补偿电路及补偿方法
公开(公告)号：US06407615B2
公开(公告)日：2002-06-18
申请号：US09549837
申请日：2000-04-14
申请人： William E. Main , Danielle L. Coffing
发明人： William E. Main , Danielle L. Coffing
IPC分类号： H01L3500
CPC分类号： G05F3/225
摘要： A temperature compensation circuit converts a control signal (IG) that has an undesirable temperature coefficient to a temperature compensated control signal (I32) having a desirable temperature coefficient. In one embodiment, four transistors (60, 64, 68, and 72) are configured to convert the control signal (IG) having an undesirable temperature coefficient to the temperature compensated control signal (I32) having the desired temperature coefficient. Additional embodiments use components to refine the temperature compensation process.
摘要翻译：温度补偿电路将具有不良温度系数的控制信号（IG）转换为具有期望温度系数的温度补偿控制信号（I32）。在一个实施例中，四个晶体管（60,64,68和72）被配置为将具有不期望的温度系数的控制信号（IG）转换成具有所需温度系数的温度补偿控制信号（I32）。另外的实施例使用组件来改善温度补偿过程。

10. 发明授权

US06249170B1 Logarithmic gain control circuit and method 有权
标题翻译：对数增益控制电路及方法
公开(公告)号：US06249170B1
公开(公告)日：2001-06-19
申请号：US09549835
申请日：2000-04-14
申请人： William E. Main , Danielle L. Coffing , Jeffrey Durec
发明人： William E. Main , Danielle L. Coffing , Jeffrey Durec
IPC分类号： G06F7556
CPC分类号： H03G7/06
摘要： An improved logarithmic amplifier (100) and method in which a signal at an output (106) is logarithmic with respect to the voltage supplied at a gain control input (102). The logarithmic amplifier (100) includes a first amplifier stage (110) and a second amplifier stage (130) which are coupled together by a current mirror stage (120). Alternative embodiments of logarithmic amplifier (200) and (300) include different biasing methods for biasing the second amplifier stage (130).
摘要翻译：一种改进的对数放大器（100）和方法，其中在输出（106）处的信号相对于在增益控制输入（102）处提供的电压是对数的。对数放大器（100）包括通过电流镜级（120）耦合在一起的第一放大级（110）和第二放大级（130）。对数放大器（200）和（300）的替代实施例包括用于偏置第二放大器级（130）的不同偏置方法。

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