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    • 1. 发明授权
    • Power supply unit for data viewing devices
    • 用于数据查看设备的电源单元
    • US4079418A
    • 1978-03-14
    • US694718
    • 1976-06-10
    • Detlef KupkaHeinz Lang
    • Detlef KupkaHeinz Lang
    • G06F1/00G09G1/00H02M3/335H04N5/04H04N3/18H04N5/44
    • G09G1/005H02M3/33553
    • The invention relates to a power supply unit for data viewing devices, which, from a main alternating voltage produces at least one d.c. voltage for the operation of the data viewing device, where the power supply unit is in the form of a switching power supply unit and contains an oscillator which produces signals which determine the switching frequency of the switching power supply unit and where the data viewing device contains a pulse generator which, in order to produce an image on a screen, produces timing pulses of a given repetition frequency and a given duration.More particularly, the control stage for a switching power supply unit of a data viewing device having a display screen includes a free-running oscillator whose frequency is synchronized by timing pulses from a pulse generator. These pulses are of a predetermined repetition frequency and a given duration. The oscillator is preferably an astable multivibrator. The output signal of the oscillator is pulse modulated and fed to the base of a switching transistor in the power supply circuit. A separator stage such as an optical coupling element or transformer, is provided in the circuit between the pulse generator and the oscillator. The oscillator may contain an amplifier provided with a positive feedback and a negative feedback and which oscillator has its control input connected to the non-inverting input of the amplifier. The non-inverting input of the amplifier preferably includes a capacitor.
    • 本发明涉及用于数据观察装置的电源单元,其从主交流电压产生至少一个直流电压。 用于数据观察装置的操作的电压,其中电源单元是开关电源单元的形式,并且包含产生确定开关电源单元的开关频率的信号的振荡器,以及数据观察装置所包含的 脉冲发生器,为了在屏幕上产生图像,产生给定重复频率和给定持续时间的定时脉冲。
    • 3. 发明授权
    • Phase locked loop system
    • 锁相环系统
    • US06636727B2
    • 2003-10-21
    • US09793340
    • 2001-02-26
    • Claus MuschallikBernd PflaumHeinz Lang
    • Claus MuschallikBernd PflaumHeinz Lang
    • H04B106
    • H03L7/0898H03J5/0281H03J5/244H03L7/183H04L27/2657H04L2027/0016H04L2027/0028H04L2027/0059H04L2027/0067H04N5/4401H04N5/455
    • A phase locked loop system for tuning the reception frequency of a receiver for digitally modulated received signals and analog-modulated received signals has at least one voltage controlled oscillator for producing an oscillator signal for a reception frequency tuning. A first frequency divider is provided for dividing the frequency of the oscillator signal to a nominal comparison frequency as a function of a receiving channel selection signal. A second frequency divider is provided for dividing a reference frequency as a function of a reception mode switching signal. A phase comparison circuit is provided for comparing the signals supplied by the frequency dividers in order to produce a tuning voltage for the voltage controlled oscillator wherein the gain of the phase comparison circuit is adjustable in order to optimize the phase noise.
    • 用于调谐用于数字调制接收信号和模拟调制接收信号的接收机的接收频率的锁相环系统具有用于产生用于接收频率调谐的振荡器信号的至少一个压控振荡器。 提供了第一分频器,用于将振荡器信号的频率与作为接收信道选择信号的函数的标称比较频率进行分频。 提供了第二分频器,用于根据接收模式切换信号来划分参考频率。 提供了相位比较电路,用于比较由分频器提供的信号,以产生用于压控振荡器的调谐电压,其中相位比较电路的增益可调,以优化相位噪声。