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1. 发明授权

US5673001A Method and apparatus for amplifying a signal 失效
标题翻译：用于放大信号的方法和装置
公开(公告)号：US5673001A
公开(公告)日：1997-09-30
申请号：US482158
申请日：1995-06-07
申请人： Jin Dong Kim , James John Crnkovic , Armin Werner Klomsdorf , David Sutherland Peckham
发明人： Jin Dong Kim , James John Crnkovic , Armin Werner Klomsdorf , David Sutherland Peckham
IPC分类号： H03F3/24 , H03F1/02 , H03F3/189 , H03G3/20 , H03G3/30 , H04B1/40
CPC分类号： H03F1/0233 , H03G3/3042 , Y02B60/50
摘要： A unique method and apparatus modifies the load impedance at the output of a power amplifier by varying a voltage variable capacitor (VVC) (310) to maximize the efficiency of the power amplifier (304). A comparator (509) generates amplifier control signal (211) based upon a detected power output signal (216) and a reference signal. In addition to providing power control, the control signal is also coupled to a VVC circuit (506) to control the output impedance of the power amplifier. In an alternate embodiment, a separate VVC control signal (527) based upon a comparison of the power control signal and the battery voltage is coupled to a VVC. In another alternate embodiment, a second VVC can be coupled in parallel to the first VVC. The second VVC is preferably controlled by a signal (805) based upon the current in the power amplifier. Finally, an alternate embodiment incorporates a VVC circuit (506) at the input of the power amplifier to compensate for variations in input impedance to improve other power amplifier parameters such as IM, gain, output power and noise level.
摘要翻译：独特的方法和装置通过改变电压可变电容器（VVC）（310）来修改功率放大器的输出处的负载阻抗，以最大化功率放大器（304）的效率。比较器（509）基于检测到的功率输出信号（216）和参考信号产生放大器控制信号（211）。除了提供功率控制之外，控制信号还耦合到VVC电路（506）以控制功率放大器的输出阻抗。在替代实施例中，基于功率控制信号和电池电压的比较的单独的VVC控制信号（527）耦合到VVC。在另一替代实施例中，第二VVC可以与第一VVC并联耦合。第二VVC优选地基于功率放大器中的电流由信号（805）控制。最后，替代实施例在功率放大器的输入处并入VVC电路（506），以补偿输入阻抗的变化，以改善其他功率放大器参数，例如IM，增益，输出功率和噪声电平。

2. 发明授权

US6020787A Method and apparatus for amplifying a signal 失效
标题翻译：用于放大信号的方法和装置
公开(公告)号：US6020787A
公开(公告)日：2000-02-01
申请号：US902340
申请日：1997-07-29
申请人： Jin Dong Kim , James John Crnkovic , Armin Werner Klomsdorf , David Sutherland Peckham
发明人： Jin Dong Kim , James John Crnkovic , Armin Werner Klomsdorf , David Sutherland Peckham
IPC分类号： H03F3/24 , H03F1/02 , H03F3/189 , H03G3/20 , H03G3/30 , H04B1/40 , H03G3/10 , H01Q11/12 , H03F1/30
CPC分类号： H03F1/0233 , H03G3/3042 , Y02B60/50
摘要： A unique method and apparatus modifies the load impedance at the output of a power amplifier by varying a voltage variable capacitor (VVC) (310) to maximize the efficiency of the power amplifier (304). A comparator (509) generates amplifier control signal (211) based upon a detected power output signal (216) and a reference signal. In addition to providing power control, the control signal is also coupled to a VVC circuit (506) to control the output impedance of the power amplifier. In an alternate embodiment, a separate VVC control signal (527) based upon a comparison of the power control signal and the battery voltage is coupled to a VVC. In another alternate embodiment, a second VVC can be coupled in parallel to the first VVC. The second VVC is preferably controlled by a signal (805) based upon the current in the power amplifier. Finally, an alternate embodiment incorporates a VVC circuit (506) at the input of the power amplifier to compensate for variations in input impedance to improve other power amplifier parameters such as IM, gain, output power and noise level.
摘要翻译：独特的方法和装置通过改变电压可变电容器（VVC）（310）来修改功率放大器的输出处的负载阻抗，以最大化功率放大器（304）的效率。比较器（509）基于检测到的功率输出信号（216）和参考信号产生放大器控制信号（211）。除了提供功率控制之外，控制信号还耦合到VVC电路（506）以控制功率放大器的输出阻抗。在替代实施例中，基于功率控制信号和电池电压的比较的单独的VVC控制信号（527）耦合到VVC。在另一替代实施例中，第二VVC可以与第一VVC并联耦合。第二VVC优选地基于功率放大器中的电流由信号（805）控制。最后，替代实施例在功率放大器的输入处并入VVC电路（506），以补偿输入阻抗的变化，以改善其他功率放大器参数，例如IM，增益，输出功率和噪声电平。

3. 发明授权

US06195536B1 Impedance matching for a dual band power amplifier 有权
公开(公告)号：US06195536B1
公开(公告)日：2001-02-27
申请号：US09562733
申请日：2000-05-01
申请人： David Sutherland Peckham , Gregory Redmond Black
发明人： David Sutherland Peckham , Gregory Redmond Black
IPC分类号： H01Q1112
CPC分类号： H03F1/56 , H04B1/00 , H04B1/005 , H04B1/04 , H04B1/0458 , H04B1/406
摘要： An exciter matching circuit (125), interstage matching circuit (134), and harmonic filter matching circuit (140) match impedances at the input to a two-stage power amplifier (130), between the first stage (132) and the second stage (136) of the power amplifier (130), and at the output of the power amplifier (130) for more than one frequency band of interest. In a GSM/DCS dual band radiotelephone (101), the matching circuits (124, 134, 140) provide low return loss at 900 MHz when the dual band transmitter (110) is operating in the GSM mode. The harmonic filter matching circuit (140) also filters out signals at 1800 MHz, 2700 MHz, and high order harmonics. When the dual band transmitter (110) is in DCS mode, however, the matching circuits (124, 134, 140) provide a low return loss at 1800 MHz and filter out signals at 2700 MHz and harmonics of 1800 MHz.

4. 发明授权

US5926751A Method and apparatus for receiving communication signals 失效
标题翻译：用于接收通信信号的方法和装置
公开(公告)号：US5926751A
公开(公告)日：1999-07-20
申请号：US803186
申请日：1997-02-19
申请人： Constantine Vlahos , David Sutherland Peckham , Frank Robert Skutta
发明人： Constantine Vlahos , David Sutherland Peckham , Frank Robert Skutta
IPC分类号： H04B1/40 , H03D7/12 , H03J1/00 , H04B1/26 , H04B1/44 , H04B1/18
CPC分类号： H04B1/006 , H03D7/12 , H03J1/0008 , H04B1/005 , H04B1/0057
摘要： A method and apparatus enables a communication device (100) to operate in multiple bands, such as GSM 900 MHz, DCS 1800 MHz, and DCS 1900 MHz bands, by eliminating the need for a mixer for each band. In a dual band GSM/DCS 1800 radiotelephone, for example, the local oscillator (LO) injection frequencies for both GSM and DCS bands are provided to a mixer (234) through the use of combination filters (222, 246). Thus, the duplexing and matching requirements to the mixer input are simplified and the signal losses are minimized. The common output ports of the GSM RX/LO combination filter and DCS RX/LO combination filter are duplexed to the input of the mixer. Also, the input impedance matching of the mixer is designed to match the impedance for the received signals in each band, as well as provide an RF trap at the IF frequency. The match at the output of the mixer is designed to match the impedance of the IF filter and provides a low impedance to RF input frequencies. Finally, a tri-band radiotelephone is also described.
摘要翻译：通过消除对每个频带的混频器的需要，一种方法和装置使得通信设备（100）能够在诸如GSM 900MHz，DCS 1800MHz和DCS 1900MHz频带之类的多个频带中工作。例如，在双频GSM / DCS 1800无线电话机中，GSM和DCS频带的本地振荡器（LO）注入频率通过使用组合滤波器（222,246）提供给混频器（234）。因此，对混频器输入的双工和匹配要求被简化，信号损耗最小化。 GSM RX / LO组合滤波器和DCS RX / LO组合滤波器的公共输出端口与混频器的输入双工。此外，混频器的输入阻抗匹配被设计为匹配每个频带中的接收信号的阻抗，以及在IF频率处提供RF陷波器。混频器输出端的匹配设计用于匹配中频滤波器的阻抗，并为RF输入频率提供低阻抗。最后还描述了三频无线电话机。

5. 发明授权

US5892410A Method and apparatus for transmitting radio frequency signals 失效
标题翻译：用于发射射频信号的方法和装置
公开(公告)号：US5892410A
公开(公告)日：1999-04-06
申请号：US802832
申请日：1997-02-19
申请人： David Sutherland Peckham
发明人： David Sutherland Peckham
IPC分类号： H03L7/099 , H03B1/00 , H03B5/18 , H04B1/40 , H03B5/00
CPC分类号： H04B1/406 , H03B5/1847 , H03B2201/0208
摘要： A transmitter VCO (204) includes nodes for receiving a band selector voltage for altering the base-emitter capactance of a transistor to enable the VCO to act as an oscillator in the appropriate band, and for altering the resonator capacitance to change the resonant frequency of the oscillator. The method and apparatus enables oscillation in different frequency bands for dual mode communication devices.
摘要翻译：发射机VCO（204）包括用于接收频带选择器电压的节点，用于改变晶体管的基极 - 发射极电容，以使VCO能够用作合适频带中的振荡器，并且用于改变谐振器电容以改变谐振频率振荡器。该方法和装置能够在双模式通信设备的不同频带中进行振荡。

6. 发明授权

US06243566B1 Impedance matching for a dual band power amplifier 有权
公开(公告)号：US06243566B1
公开(公告)日：2001-06-05
申请号：US09562734
申请日：2000-05-01
申请人： David Sutherland Peckham , Gregory Redmond Black
发明人： David Sutherland Peckham , Gregory Redmond Black
IPC分类号： H01Q1112
CPC分类号： H03F1/56 , H04B1/00 , H04B1/005 , H04B1/04 , H04B1/0458 , H04B1/406
摘要： An exciter matching circuit (125), interstage matching circuit (134), and harmonic filter matching circuit (140) match impedances at the input to a two-stage power amplifier (130), between the first stage (132) and the second stage (136) of the power amplifier (130), and at the output of the power amplifier (130) for more than one frequency band of interest. In a GSM/DCS dual band radiotelephone (101), the matching circuits (124, 134, 140) provide low return loss at 900 MHz when the dual band transmitter (110) is operating in the GSM mode. The harmonic filter matching circuit (140) also filters out signals at 1800 MHz, 2700 MHz, and high order harmonics. When the dual band transmitter (110) is in DCS mode, however, the matching circuits (124, 134, 140) provide a low return loss at 1800 MHz and filter out signals at 2700 MHz and harmonics of 1800 MHz.

7. 发明授权

US06215359B1 Impedance matching for a dual band power amplifier 有权
标题翻译：双频功率放大器的阻抗匹配
公开(公告)号：US06215359B1
公开(公告)日：2001-04-10
申请号：US09563721
申请日：2000-05-01
申请人： David Sutherland Peckham , Gregory Redmond Black
发明人： David Sutherland Peckham , Gregory Redmond Black
IPC分类号： H03F3191
CPC分类号： H03F1/56 , H04B1/00 , H04B1/005 , H04B1/04 , H04B1/0458 , H04B1/406
摘要： An exciter matching circuit (125), interstage matching circuit (134), and harmonic filter matching circuit (140) match impedances at the input to a two-stage power amplifier (130), between the first stage (132) and the second stage (136) of the power amplifier (130), and at the output of the power amplifier (130) for more than one frequency band of interest. In a GSM/DCS dual band radiotelephone (101), the matching circuits (124, 134, 140) provide low return loss at 900 MHz when the dual band transmitter (110) is operating in the GSM mode. The harmonic filter matching circuit (140) also filters out signals at 1800 MHz, 2700 MHz, and high order harmonics. When the dual band transmitter (110) is in DCS mode, however, the matching circuits (124, 134, 140) provide a low return loss at 1800 MHz and filter out signals at 2700 MHz and harmonics of 1800 MHz.
摘要翻译：激励器匹配电路（125），级间匹配电路（134）和谐波滤波器匹配电路（140）将在两级功率放大器（130）的输入端的阻抗匹配在第一级（132）和第二级（130）的功率放大器（130）的输出端以及用于多于一个感兴趣频带的功率放大器（130）的输出端。在GSM / DCS双频带无线电话（101）中，当双频带发射机（110）以GSM模式工作时，匹配电路（124,134,140）在900MHz时提供低回波损耗。谐波滤波器匹配电路（140）还滤除1800MHz，2700MHz和高次谐波的信号。然而，当双频带发射机（110）处于DCS模式时，匹配电路（124,134,140）在1800MHz提供低回波损耗并且滤除2700MHz的信号和1800MHz的谐波。

8. 发明授权

US6078794A Impedance matching for a dual band power amplifier 失效
标题翻译：双频功率放大器的阻抗匹配
公开(公告)号：US6078794A
公开(公告)日：2000-06-20
申请号：US802831
申请日：1997-02-19
申请人： David Sutherland Peckham , Gregory Redmond Black
发明人： David Sutherland Peckham , Gregory Redmond Black
IPC分类号： H04B1/00 , H04B1/04 , H04B1/40 , H01Q11/12
CPC分类号： H03F1/56 , H04B1/005 , H04B1/0458 , H04B1/406 , H04B1/00 , H04B1/04
摘要： An exciter matching circuit (125), interstage matching circuit (134), and harmonic filter matching circuit (140) match impedances at the input to a two-stage power amplifier (130), between the first stage (132) and the second stage (136) of the power amplifier (130), and at the output of the power amplifier (130) for more than one frequency band of interest. In a GSM/DCS dual band radiotelephone (101), the matching circuits (124, 134, 140) provide low return loss at 900 MHz when the dual band transmitter (110) is operating in the GSM mode. The harmonic filter matching circuit (140) also filters out signals at 1800 MHz, 2700 MHz, and high order harmonics. When the dual band transmitter (110) is in DCS mode, however, the matching circuits (124, 134, 140) provide a low return loss at 1800 MHz and filter out signals at 2700 MHz and harmonics of 1800 MHz.
摘要翻译：激励器匹配电路（125），级间匹配电路（134）和谐波滤波器匹配电路（140）将在两级功率放大器（130）的输入端的阻抗匹配在第一级（132）和第二级（130）的功率放大器（130）的输出端以及用于多于一个感兴趣频带的功率放大器（130）的输出端。在GSM / DCS双频带无线电话（101）中，当双频带发射机（110）以GSM模式工作时，匹配电路（124,134,140）在900MHz时提供低回波损耗。谐波滤波器匹配电路（140）还滤除1800MHz，2700MHz和高次谐波的信号。然而，当双频带发射机（110）处于DCS模式时，匹配电路（124,134,140）在1800MHz提供低回波损耗并且滤除2700MHz的信号和1800MHz的谐波。

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