公开(公告)号：US3138763A

公开(公告)日：1964-06-23

申请号：US82910559

申请日：1959-07-23

Applicant: ZENITH RADIO CORP

Inventor： HENDRICKSON MELVIN C

IPC: G01R19/04 ,  H03M1/00

CPC classification number: G01R19/04 ,  H03M1/64

公开(公告)号：US3673487A

公开(公告)日：1972-06-27

申请号：US3673487D

申请日：1970-09-08

Applicant: ZENITH RADIO CORP

Inventor： HENDRICKSON MELVIN C

IPC: H02M1/00 ,  H02M1/42 ,  H02M3/156 ,  H02M7/12

CPC classification number: H02M1/4208 ,  H02M3/156 ,  Y02B70/126

Abstract: A switching-type regulating power supply which dissipates little power, minimizes radio frequency interference, and provides a constant DC output voltage has a full-wave rectifier with a regulating means in its common return circuit to switch the fullwave rectified current supplied to an output filter on and off. The current is switched on when there is zero voltage across the full-wave rectifier thus minimizing radio-frequency-interferencecausing surge currents, and this is accomplished by a phase synchronizer which is coupled to the input terminals of the fullwave rectifier and also coupled to the control means which applies a variable duty cycle control voltage to the regulating means. The control means is coupled to the output voltage filter and generates a variable duty cycle control voltage in response to changes in the DC output voltage of the supply. This varying duty cycle control voltage is applied to the regulating means to control the time in which the regulating means allows current to flow to the output filter which results in output voltage stabilization.

Abstract translation: 一种切换式调节电源，其功率很小，使射频干扰最小化，并提供恒定的直流输出电压，其全波整流器在其公共回路中具有调节装置，以将提供给 输出滤波器开关。 当全波整流器上的电压为零电压时，电流接通，从而最小化射频干扰引起的浪涌电流，这是通过一个相位同步器实现的，该相位同步器耦合到全波整流器的输入端， 还耦合到对调节装置施加可变占空比控制电压的控制装置。 控制装置耦合到输出电压滤波器，并且响应于电源的DC输出电压的变化而产生可变占空比控制电压。 这种变化的占空比控制电压被施加到调节装置以控制调节装置允许电流流向输出滤波器的时间，这导致输出电压稳定。

公开(公告)号：US3466385A

公开(公告)日：1969-09-09

申请号：US3466385D

申请日：1967-06-13

Applicant: ZENITH RADIO CORP

Inventor： HENDRICKSON MELVIN C

IPC: H04N7/16 ,  H04N1/44

CPC classification number: H04N7/163

公开(公告)号：US3023270A

公开(公告)日：1962-02-27

申请号：US82910759

申请日：1959-07-23

Applicant: ZENITH RADIO CORP

Inventor： EILERS CARL G ,  HENDRICKSON MELVIN C ,  HERRMANN RICHARD C

IPC: H04N7/167

CPC classification number: H04N7/167

公开(公告)号：US3924191A

公开(公告)日：1975-12-02

申请号：US45702174

申请日：1974-04-01

Applicant: ZENITH RADIO CORP

Inventor： COLLINS JOHNNY ,  HENDRICKSON MELVIN C

IPC: H03J5/02 ,  H04B1/16

CPC classification number: H03J5/0227 ,  H03J5/0236

Abstract: A varactor tuner television receiver touch-tuning system includes a clock pulse-driven counter supplying a binary to decimal converter, which is coupled to an analog switch for sequentially transferring control of the tuner among a plurality of tuning positions. A tuning potentiometer, a position indicator and a position switch are located at each tuning position. Upon closure of any position switch, a transistor switch is enabled to start the counter. The transistor switch is disabled to stop the counter when the selected tuning position is reached.

Abstract translation: 变容二极管调谐器电视接收机触摸调谐系统包括提供二进制到十进制转换器的时钟脉冲驱动计数器，其耦合到用于在多个调谐位置之间依次传送调谐器的控制的模拟开关。 调谐电位器，位置指示器和位置开关位于每个调谐位置。 在任何位置开关闭合时，晶体管开关启动计数器。 当达到所选调谐位置时，晶体管开关被禁止停止计数器。

公开(公告)号：US3582783A

公开(公告)日：1971-06-01

申请号：US3582783D

申请日：1968-12-19

Applicant: ZENITH RADIO CORP

Inventor： HENDRICKSON MELVIN C

IPC: G08C19/28 ,  H04Q9/00

CPC classification number: G08C19/28

Abstract: A multiple-function remote control system using digital logic for selectively actuating any desired one of a plurality of control devices respectively assigned to perform a corresponding plurality of control functions. The transmitter has an oscillator to generate a timing pulse signal. A diode logic system is responsive to the timing pulses to develop a plurality of digital signals, each signal consisting of a predetermined combination code group of the timing pulses and corresponding to one of the control functions. A manual switch is used to select a particular code group corresponding to the function the operator desires to control. A carrier-wave oscillator is frequency modulated by the selected code signal and the composite signal is transmitted to the receiver wherein the selected code signal is recovered. A diode logic system in the receiver deciphers the recovered code group and generates an appropriate actuating signal for application to the control device corresponding to the desired control function. To enhance the system''s immunity to extraneous signals, an inhibiting circuit is provided comprising a timing signal generator in the receiver responsive to the received modulated carrier wave signal to reconstruct therefrom the timing signal generated in the transmitter. The reconstructed timing pulses are simultaneously applied to a detector and gating circuit to permit application of the actuating signal to the control device. In the absence of a received carrier wave signal modulated by a code signal, no timing signal pulses are reconstructed and the inhibiting circuit does not permit application of an actuating signal to a control device.

公开(公告)号：US3396232A

公开(公告)日：1968-08-06

申请号：US37969064

申请日：1964-07-01

Applicant: ZENITH RADIO CORP

Inventor： HENDRICKSON MELVIN C ,  MORRIS GEORGE V

IPC: H04N7/173

CPC classification number: H04N7/17309 ,  H04N2007/17372 ,  H04N2007/1739

公开(公告)号：US3081378A

公开(公告)日：1963-03-12

申请号：US2655060

申请日：1960-05-03

Applicant: ZENITH RADIO CORP

Inventor： HENDRICKSON MELVIN C

IPC: H04N7/167

CPC classification number: H04N7/167

公开(公告)号：US3906373A

公开(公告)日：1975-09-16

申请号：US50813874

申请日：1974-09-23

Applicant: ZENITH RADIO CORP

Inventor： HENDRICKSON MELVIN C

IPC: H03J1/14 ,  H03J5/02 ,  H03J7/12 ,  H03J5/24 ,  H04B1/16

CPC classification number: H03J5/0209 ,  H03J1/14 ,  H03J7/12

Abstract: A television channel selector includes UHF and VHF tuners each having a varactor as the frequency-determining element. A number of fixed contacts on a rotary switch are respectively associated with different channels in both the VHF and UHF regions of the spectrum; also included on the switch are a pair of selection contacts. Printed on the same substrate which carries the switch contacts are a plurality of resistors which together constitute a voltage divider that has individually different junctions between the resistors connected to respective different ones of the fixed contacts. A fasttuning shaft drives the selection contacts over the fixed contacts. That shaft is detented each time the selection contacts are moved over a chosen number of the fixed contacts. A slow-tuning shaft is coupled through a gear system to the fast-tuning shaft. The slow-tuning shaft is detented in rotational increments that correspond to movement of the selection contacts, through the gear system and the first shaft, from each one of the fixed contacts to the next. The selection contacts read out a voltage from the divider which is fed to the varactors in determination of frequency. For fine tuning, the varactor control voltage is derived from a tap on a potentiometer the opposite ends of which are connected by the selection contacts across selected individual different ones of the resistors in the voltage divider.

Abstract translation: 电视频道选择器包括UHF和VHF调谐器，每个具有变容二极管作为频率确定元件。 旋转开关上的多个固定触点分别与频谱的VHF和UHF区域中的不同通道相关联; 还包括在交换机上的是一对选择联系人。 印刷在承载开关触点的相同基板上的是多个电阻器，它们一起构成分压器，该分压器在连接到相应的不同固定触头的电阻之间具有单独的不同的结。 快速调节轴通过固定触点驱动选择触点。 每当选择触点在选定数量的固定触点上移动时，该轴被定位。 慢调轴通过齿轮系联接到快速调节轴。 慢调节轴以旋转增量进行定位，其对应于选择触点通过齿轮系统和第一轴从每个固定触头移动到下一个。 选择触点在确定频率时从分压器读出电压，该分压器被馈送到变容二极管。 对于微调，变容二极管的控制电压是从电位器上的抽头导出的，其电位器的相对端通过分压器中所选择的各个不同电阻器之间的选择触点连接。

公开(公告)号：US3691297A

公开(公告)日：1972-09-12

申请号：US3691297D

申请日：1971-05-06

Applicant: ZENITH RADIO CORP

Inventor： MERRELL RICHARD G ,  HENDRICKSON MELVIN C

IPC: H04N5/12 ,  H04N5/04

CPC classification number: H04N5/12

Abstract: A synchronization phase-lock system in a television receiver for maintaining coincidence between locally-generated vertical synchronization pulses and vertical synchronization pulses developed from received television transmissions. The phase-lock system utilizes the received vertical sync pulses in conjunction with gating circuitry to condition an up/down binary counter to count, within predetermined limits, in a first, or ''''up'''', direction during the received vertical sync interval and in the opposite, or ''''down'''' direction during the vertical trace interval of the received signal. Locally generated vertical sync pulses are also applied to the up/down binary counter wherein each pulse initiates one count. A locally generated vertical sync pulse occurring during the received vertical sync pulse interval generates one ''''up'''' count representative of coincidence between the received and locally generated vertical sync pulses. If the locally generated vertical sync pulse occurs during the vertical trace interval, a ''''down'''' count indicating non-coincidence is initiated. The phase-lock system further includes a reset gating circuit activated by the up/down binary counter reaching its ''''down'''' counting limit for resetting the phase of the locally generated vertical sync pulses such that they will be coincident with the received vertical sync pulses.