Output power control circuit for a mobile radio apparatus
    1.
    发明授权
    Output power control circuit for a mobile radio apparatus 失效
    用于移动无线电设备的输出功率控制电路

    公开(公告)号:US4870698A

    公开(公告)日:1989-09-26

    申请号:US113115

    申请日:1987-10-27

    摘要: An output power control circuit is provided in a casing of a mobile radio apparatus together with an automatic power control circuit and an RF signal amplifier. The output power control circuit applied level control signals to the automatic power control circuit for maintaining the power level of the output RF signal of the RF amplifier at one of a plurality of output power levels corresponding to the level control signals. The output power control circuit has a receiver, a temperature sensing circuit and a logic circuit. The receiver receives RF signals transmitted by a master station and detects power level setting command signals included in the received RF signal. The temperature sensing circuit detects an internal temperature of the casing and provides a power reduction signal upon detecting that the internal temperature has exceeded a predetermined temperature. The logic circuit receives the power level setting command signal from said receiver, and generates a level control signal for determining an output power level corresponding to the power level setting command signal, and generates a level control signal for determining an output power level which is lower than that specified by the power level setting command signal upon receiving the power reduction signal from the temperature sensing circuit.

    摘要翻译: 输出功率控制电路与自动功率控制电路和RF信号放大器一起设置在移动无线电设备的壳体中。 输出功率控制电路将电平控制信号施加到自动功率控制电路,用于将RF放大器的输出RF信号的功率电平维持在与电平控制信号对应的多个输出功率电平中的一个上。 输出功率控制电路具有接收器,温度检测电路和逻辑电路。 接收机接收由主站发送的RF信号,并且检测包括在所接收的RF信号中的功率电平设置命令信号。 温度检测电路检测到壳体的内部温度,并且在检测到内部温度已经超过预定温度时提供功率降低信号。 逻辑电路接收来自所述接收机的功率电平设定命令信号,并产生用于确定与功率电平设定指令信号对应的输出功率电平的电平控制信号,并生成电平控制信号,以确定较低的输出功率电平 比从温度检测电路接收到功率降低信号时由功率电平设定指令信号指定的值高。

    Digital-analog shared circuit in dual mode radio equipment
    3.
    发明授权
    Digital-analog shared circuit in dual mode radio equipment 失效
    双模无线电设备中的数模模拟共享电路

    公开(公告)号:US5844868A

    公开(公告)日:1998-12-01

    申请号:US824794

    申请日:1997-03-26

    CPC分类号: H04B1/403

    摘要: A digital-analog shared circuit in dual mode radio equipment, which shares a local oscillator in a digital mode and analog mode. A first frequency synthesizer generates a first and a second local oscillation frequency in a digital and an analog receiving mode, respectively, in response to a control signal from a switching control. In the digital receiving mode, a quadrature demodulater including a first and a second demodulator in a demodulator section is enabled, and carries out quadrature detection of a received signal fed from an RF stage, thereby supplying the detected signal to a baseband signal processor stage. In the analog receiving mode, a buffer to which the second local oscillation frequency is supplied is enabled to deliver the second local oscillation frequency to the analog IF stage. A second frequency synthesizer generates a third local oscillation frequency in a digital transmitting mode and a fourth local oscillation frequency in an analog transmitting mode. In the digital transmitting mode, a quadrature modulator including a first and a second modulator is enabled to carry out quadrature modulation using the third local oscillation frequency. In the analog transmitting mode, the fourth local oscillation frequency undergoes frequency modulation by an analog modulating signal, and the modulated signal is in turn supplied to the RF stage through the second modulator.

    摘要翻译: 双模无线电设备中的数模模拟共享电路,以数字模式和模拟模式共享本地振荡器。 第一频率合成器响应于来自开关控制的控制信号,分别在数字和模拟接收模式中产生第一和第二本地振荡频率。 在数字接收模式中,在解调器部分中包括第一解调器和第二解调器的正交解调器被使能,并且对从RF级馈送的接收信号进行正交检测,从而将检测信号提供给基带信号处理器级。 在模拟接收模式中,提供第二本地振荡频率的缓冲器能够将第二本地振荡频率传送到模拟IF级。 第二频率合成器在模拟发送模式中以数字发送模式和第四本地振荡频率产生第三本地振荡频率。 在数字发送模式中,包括第一和第二调制器的正交调制器能够使用第三本地振荡频率进行正交调制。 在模拟发送模式中,第四本地振荡频率通过模拟调制信号进行频率调制,并且调制信号又通过第二调制器提供给RF级。

    CDMA transmitter having a variable gain circuit inserted between a
transmitter mixer and a transmitter antenna
    4.
    发明授权
    CDMA transmitter having a variable gain circuit inserted between a transmitter mixer and a transmitter antenna 失效
    CDMA发射机具有插入发射机混频器和发射机天线之间的可变增益电路

    公开(公告)号:US6041081A

    公开(公告)日:2000-03-21

    申请号:US820994

    申请日:1997-03-19

    CPC分类号: H03G3/3042 H04J13/00

    摘要: A CDMA transmitter having a variable gain circuit inserted between a transmitter mixer and a transmitter antenna. The gain is controlled in response to the RF output power so that the spurious emission level at the maximum RF output power and that at output power reduced by a predetermined amount can be both satisfied. This makes it possible to increase the degree of freedom of choosing circuit components in the RF stage.

    摘要翻译: 一种CDMA发射机,其具有插入在发射机混频器和发射机天线之间的可变增益电路。 响应于RF输出功率来控制增益,使得最大RF输出功率处的杂散发射电平和输出功率降低预定量的杂散发射电平都可以满足。 这使得可以增加在RF级中选择电路元件的自由度。

    Wireless telecommunication equipment
    5.
    发明授权
    Wireless telecommunication equipment 失效
    无线电信设备

    公开(公告)号:US6011980A

    公开(公告)日:2000-01-04

    申请号:US900703

    申请日:1997-07-25

    摘要: A wireless telecommunication equipment having a receiver portion and a transmitter portion. An automatic gain control amplifier having a gain varied in accordance with an automatic gain control signal input thereto is located in the receiver portion of the equipment, and a transmission power control amplifier having a gain varied in accordance with an open loop control signal input thereto is located in the transmitter portion of said equipment. The automatic gain control and the transmission power control amplifiers have the same operating characteristics.

    摘要翻译: 一种具有接收机部分和发射机部分的无线电信设备。 具有根据输入的自动增益控制信号而变化的增益的自动增益控制放大器位于设备的接收机部分中,并且具有根据输入的开环控制信号而变化的增益的发送功率控制放大器是 位于所述设备的发射机部分。 自动增益控制和发射功率控制放大器具有相同的工作特性。

    Combination photographing and developing apparatus
    6.
    发明授权
    Combination photographing and developing apparatus 失效
    组合拍摄和显影装置

    公开(公告)号:US4370041A

    公开(公告)日:1983-01-25

    申请号:US312714

    申请日:1981-10-19

    申请人: Tsutomu Katsuyama

    发明人: Tsutomu Katsuyama

    IPC分类号: G03B17/50

    CPC分类号: G03B17/50

    摘要: Combination photographing and developing apparatus incorporates in the photographing section thereof a storage reel capable of being selectively rotated in the forward or rearward direction in addition to a payoff reel having a roll of film thereon. During photography, the storage reel is rotated in the forward direction synchronously with the photographing operation to take up the exposed portion of the film thereon. When the photographing operation is completed, the film is cut at the tail end of the exposed portion thereof and the storage reel is rotated in the rearward direction, so that the exposed portion of the film is forwarded, with the cut tail end thereof in the lead, to the developing section, there to be developed and dried.

    摘要翻译: 组合拍摄和显影装置在其拍摄部分中包括一个存储卷轴,该存储卷轴除了具有一卷胶片的发送卷轴之外,还可以沿向前或向后方向选择性地旋转。 在拍摄期间,存储卷轴与摄影操作同步地向前方向旋转,以将胶片的曝光部分卷取在其上。 当拍摄操作完成时,胶片在其暴露部分的尾端处被切割,并且存储卷轴沿向后的方向旋转,使得胶片的曝光部分被转动,其切割尾端在 领导到发展中的部分,要开发和干燥。

    High frequency receiving circuit for mobile communication apparatus
    8.
    发明授权
    High frequency receiving circuit for mobile communication apparatus 失效
    用于移动通信设备的高频接收电路

    公开(公告)号:US6112070A

    公开(公告)日:2000-08-29

    申请号:US837095

    申请日:1997-04-14

    摘要: A receiving wave containing a desired signal and received through an antenna is inputted to an interstage band-pass filter 4 after the component outside a receiving band of the receiving wave has been attenuated by a receiving band-pass filter 2a. A phase locked loop circuit 9 outputs a frequency control voltage corresponding to a selected channel to a voltage control oscillator 8 and also outputs this frequency control voltage to an interstage band-pass filter 4 as a band control voltage thereof. The voltage control oscillator 8 generates a local carrier wave in response to the frequency control voltage. The interstage variable band-pass filter 4 has a passing band width which is a little wider than channel band width and varies its passing band in response to the band control voltage so as to include the selected channel, thereby attenuating the component outside the passing band of the receiving wave inputted from the low noise amplifier 3 and then inputs the receiving wave to a mixer 5. Accordingly, if a frequency which causes a single-signal interference is located in the receiving band apart from the selected channel frequency by a half of the intermediate frequency, the interference wave of this frequency can be attenuated.

    摘要翻译: 在接收波段的接收频带外部的分量被接收带通滤波器2a衰减后,包含期望信号并通过天线接收的接收波被输入到级间带通滤波器4。 锁相环电路9将对应于所选通道的频率控制电压输出到电压控制振荡器8,并将该频率控制电压作为其频带控制电压输出到级间带通滤波器4。 电压控制振荡器8根据频率控制电压产生本地载波。 级间可变带通滤波器4具有比通道带宽稍宽的通带宽度,并且响应于频带控制电压而改变其通过频带,以便包括所选择的频道,从而衰减通过频带外的分量 从低噪声放大器3输入的接收波,然后将接收波输入到混频器5.因此,如果导致单信号干扰的频率位于接收频带中,所述接收频带与所选频道频率相隔一半以上 中频,该频率的干扰波可以衰减。

    Antenna switching circuit employing FETs for reduced power consumption
    9.
    发明授权
    Antenna switching circuit employing FETs for reduced power consumption 失效
    采用FET降低功耗的天线切换电路

    公开(公告)号:US5475875A

    公开(公告)日:1995-12-12

    申请号:US258633

    申请日:1994-06-10

    摘要: An antenna switching circuit comprises a first amplifier including a first FET receiving a first receive signal from a first antenna at a gate of the first FET, and amplifying the first receive signal, and outputting the amplified signal via a drain of the first FET to an output terminal, and a second amplifier including a second FET receiving a second receive signal from a second antenna at a gate of the second FET, and amplifying the second receive signal and outputting the amplified signal via a drain of the second FET to the output terminal. The first and second FETs are coupled to receive, at their sources, first and second control signals complementary to each other so that one of the FETs is made active while the other is made inactive, depending on values of the first and second control signals. The consumption current is reduced, and in addition, an amplifier in a receiver provided to receive the output of the antenna switching circuit may be omitted.

    摘要翻译: 一种天线切换电路包括:第一放大器,包括:第一FET,其接收来自第一FET的栅极处的第一天线的第一接收信号,并放大第一接收信号;以及经由第一FET的漏极将放大信号输出到 输出端子,以及第二放大器,包括在第二FET的栅极处从第二天线接收第二接收信号的第二FET,并且放大第二接收信号,并且经由第二FET的漏极将放大的信号输出到输出端子 。 第一和第二FET被耦合以在它们的源处接收彼此互补的第一和第二控制信号,使得根据第一和第二控制信号的值,FET中的一个被激活而另一个被激活。 消耗电流降低,并且另外,可以省略设置用于接收天线切换电路的输出的接收器中的放大器。

    Device for storing exposed film for photographing and developing
apparatus
    10.
    发明授权
    Device for storing exposed film for photographing and developing apparatus 失效
    用于存储用于拍摄和显影装置的曝光胶片的装置

    公开(公告)号:US4531819A

    公开(公告)日:1985-07-30

    申请号:US584149

    申请日:1984-02-27

    申请人: Tsutomu Katsuyama

    发明人: Tsutomu Katsuyama

    IPC分类号: G03B17/50 G03D13/00

    CPC分类号: G03D13/003 G03B17/50

    摘要: A device for storing exposed film for a photographing and developing apparatus comprises a first pinch roller pair provided in the vicinity of a storage reel, a second pinch roller pair provided at a spacing from the storage reel and a guide means for guiding exposed film from the first pinch roller pair to the second pinch roller pair. The first and second pinch roller pairs, the guide means and associated film transport roller means are controlled as to the direction of rotation and position, whereby an exposed film portion supplied from a photographing unit is taken up once on a film storage reel and then reliably fed to a developing unit by the action of the guide member.

    摘要翻译: 用于存储用于拍摄和显影装置的曝光胶片的装置包括设置在存储卷轴附近的第一夹送辊对,与存放卷轴间隔设置的第二夹送辊对,以及用于将曝光胶片从 第一夹送辊对对第二夹送辊对。 第一和第二夹送辊对,引导装置和相关的胶片传送辊装置被控制为旋转和位置的方向,由此从拍摄单元提供的曝光胶片部分在胶卷存储卷轴上被卷取一次然后可靠地 通过引导构件的作用将其馈送到显影单元。