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公开(公告)号：KR820001333B1
公开(公告)日：1982-07-23
申请号：KR780002945
申请日：1978-09-27
Applicant: MOTOROLA INC
Abstract: The AM receiver comprises an input stage(11, 12) for receiving the compatible stereo signal of (I+L+R)cos(Wct+0) and translating the signal to an intermediate frequency signal. A detector(16) is coupled to the input stage for providing the output signal which is proportional to the (L-R)cos. A corrector circuit(17, 22, 23, 25) which is coupled to the detector(16) provides a correctional signal for use in restoring exact sum and difference signals.
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公开(公告)号：US3812525A
公开(公告)日：1974-05-21
申请号：US26537772
申请日：1972-06-22
Applicant: MOTOROLA INC
Inventor： HILBERT F
CPC classification number: H04N9/7933
Abstract: A color television recording system is shown wherein trains of pulses are produced by a CRT sweeping recorded color information on a film. Each train of pulses is preceded by several pulses representative of a low frequency of the system and several pulses representative of a high frequency of the system. The two groups of pulses are separated and detected to provide DC signals which are compared to produce a difference signal. The difference signal is utilized to peak an amplifier in the recording system so that the frequency response of the system is at a predetermined ratio for the high and low frequencies.
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3.发明授权Frequency multiplying circuit utilizing time gates and switching signals of differing phases 失效频率乘法电路利用时间门和切换信号的不同阶段
公开(公告)号：US3721766A
公开(公告)日：1973-03-20
申请号：US3721766D
申请日：1970-11-16
Applicant: MOTOROLA INC
Inventor： HILBERT F
CPC classification number: H03D1/2227
Abstract: Demodulation of standard FM multiplex stereophonic signals is accomplished without using a 38kHz frequency doubler operating in response to the 19kHz pilot tone signal. The first stage of demodulation is accomplished in a first gated symmetrical time gate which is supplied with the composite input signals and is switched in synchronism with the 19kHz pilot signal. The two outputs of this time gate then constitute inputs to second and third time gates which are synchronously switched by a 19kHz signal at quadrature with the signal switching the first time gate. By combining appropriate outputs of the second and third time gates, the demodulated left and right audio information is obtained.
Abstract translation: 在不使用响应于19kHz导频音信号的38kHz倍频器的情况下，实现标准FM多路立体声信号的解调。 第一级解调是在第一门控对称时间门中完成的，该门提供复合输入信号，并与19kHz导频信号同步切换。 该时间门的两个输出然后构成对第二和第三时间门的输入，该第二和第三时间门由信号切换第一时间门的正交的19kHz信号同步切换。 通过组合第二和第三时间门的适当输出，获得解调的左和右音频信息。
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公开(公告)号：US3833823A
公开(公告)日：1974-09-03
申请号：US36043173
申请日：1973-05-15
Applicant: MOTOROLA INC
CPC classification number: H04N9/68
Abstract: A color television receiver uses an integrated circuit to provide the subcarrier reference signals and ACC control voltage for the receiver. The circuit includes a first differential amplifier, unbalanced at the burst signal frequency, operated as the color reference oscillator to provide first and second differently phased output signals which are applied to a pair of differential steering gates. A phase-shift hue control of the color reference signal is obtained by adding selected outputs of the pair of differential steering gates. In addition, a differential amplifier is operated as a diodeless detector for deriving an ACC voltage from the oscillator output when burst signals are applied to the input of the oscillator.
Abstract translation: 彩色电视接收机使用集成电路为接收机提供子载波参考信号和ACC控制电压。 该电路包括在突发信号频率处不平衡的第一差分放大器，作为颜色参考振荡器操作，以提供施加到一对差动转向门的第一和第二不同相位的输出信号。 通过添加该对差动转向门的选定输出来获得彩色参考信号的相移色调控制。 此外，差分放大器作为二体检测器操作，用于当突发信号施加到振荡器的输入端时从振荡器输出导出ACC电压。
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公开(公告)号：US3781701A
公开(公告)日：1973-12-25
申请号：US3781701D
申请日：1971-03-04
Applicant: MOTOROLA INC
Abstract: A color television receiver uses an integrated circuit to provide the subcarrier reference signals and ACC control voltage for the receiver. The circuit includes a first differential amplifier, unbalanced at the burst signal frequency, operated as the color reference oscillator to provide first and second differently phased output signals which are applied to a pair of differential steering gates. A phase-shift hue control of the color reference signal is obtained by adding selected outputs of the pair of differential steering gates. In addition, a differential amplifier is operated as a diodeless detector for deriving an ACC voltage from the oscillator output when burst signals are applied to the input of the oscillator.
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Patent Agency Ranking
公开(公告)号：US3772479A
公开(公告)日：1973-11-13
申请号：US3772479D
申请日：1971-10-19
Applicant: MOTOROLA INC
Inventor： HILBERT F
CPC classification number: H04S1/002
Abstract: A stereo-effect enhancement system for increasing the apparent spatial separation in a multi-channel audio system includes variable gain amplifiers and comparator circuits which compare the amplitudes of the audio input signals and adjust the gain of the variable gain amplifiers in accordance with the ratio of the amplitudes of the audio input signals. Spatially expanded two channel stereo, pseudo three channel stereo, pseudo four channel stereo or automatic stereo balance control may be achieved by variously combining the audio signals from the enhancement system with the unmodified audio input signals.
Abstract translation: 用于增加多通道音频系统中的表观空间间隔的立体声效果增强系统包括可变增益放大器和比较器电路，其比较音频输入信号的幅度并根据比例电路的比例调节可变增益放大器的增益 音频输入信号的幅度。 空间扩展的双声道立体声，伪三声道立体声，伪四声道立体声或自动立体声平衡控制可以通过将来自增强系统的音频信号与未修改的音频输入信号进行不同的组合来实现。
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公开(公告)号：US3753121A
公开(公告)日：1973-08-14
申请号：US3753121D
申请日：1971-05-03
Applicant: MOTOROLA INC
Inventor： HILBERT F
CPC classification number: H03F1/0261 , H03G3/3005
Abstract: There is disclosed an audio amplifying output circuit for a receiver which includes biasing means for operating the output transistor to a minimum operating current level. The circuit is DC coupled to the preceeding stage as for example, the IF detector stage, so as to receive the DC component of the detected carrier signal. The DC component of the detected carrier signal is applied directly to the base of the transistor to increase its collector current in accordance with the amplitude of the driving signal thereby preventing transistor cut-off when signals of higher levels are received thereby.
Abstract translation: 公开了一种用于接收机的音频放大输出电路，其包括用于将输出晶体管操作到最小工作电流电平的偏置装置。 电路直流耦合到前级，例如IF检测器级，以便接收检测到的载波信号的DC分量。 检测到的载波信号的直流分量直接施加到晶体管的基极，以根据驱动信号的幅度增加其集电极电流，从而当接收到较高电平的信号时防止晶体管截止。
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公开(公告)号：US3743863A
公开(公告)日：1973-07-03
申请号：US3743863D
申请日：1971-11-03
Applicant: MOTOROLA INC
CPC classification number: H03F3/191 , H03F2203/45162 , H03F2203/45198 , H03F2203/45208 , H03F2203/45498 , H03F2203/45606 , H03F2203/45612 , H03F2203/45704
Abstract: Transistorized differential circuits include a biasing system that substantially reduces the need for resistors in the base circuits of the transistors being biased. An inductor coupled between the base of one of the transistors and a power supply forward biases the base-emitter junction of the transistor, and the other base is coupled to the same point of the power supply to bias the transistor so that the voltages at the bases of the transistors are substantially equal to each other, and are at substantially the voltage of the power supply to which the inductor is connected. This technique is applicable to balanced or unbalanced differential transistor circuits, and may be employed in amplifiers, mixers, limiters, multipliers and oscillators and in other small signal applications.
Abstract translation: 晶体管化差分电路包括偏置系统，其基本上减少了被偏置的晶体管的基极中的电阻器的需要。 耦合在晶体管之一的基极之间的电感器和电源向前偏置晶体管的基极 - 发射极结，而另一个基极耦合到电源的相同点以偏置晶体管，使得在 晶体管的基极基本上彼此相等，并且基本上是电感器连接到的电源的电压。 该技术适用于平衡或不平衡差动晶体管电路，可用于放大器，混频器，限幅器，乘法器和振荡器以及其他小信号应用中。
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公开(公告)号：BR7016629D0
公开(公告)日：1973-01-04
申请号：BR21662970
申请日：1970-02-06
Applicant: MOTOROLA INC
IPC: H03D1/22
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