公开(公告)号：US3603732A

公开(公告)日：1971-09-07

申请号：US3603732D

申请日：1969-06-05

Applicant: RCA CORP

Inventor： GEORGE JOHN BARRETT

IPC: H04N5/68 ,  H04B1/16 ,  H04N5/00 ,  H04N5/63 ,  H04N3/16

CPC classification number: H04N5/63 ,  H02M2001/0032 ,  H04W52/0274 ,  Y02B70/16 ,  Y02D70/00

Abstract: In a solid state television receiver, the primary windings of a main and an auxiliary transformer are both coupled across an AC input line. A single-pole, single-throw switch interposed in one conductor of AC input line subsequent to auxiliary transformer takeoff point permits deenergization of main transformer primary winding without interrupting energization of auxiliary transformer primary winding. One secondary winding of main transformer provides AC input to television receiver power supply. Kinescope filament is energized by circuit comprising a secondary winding of auxiliary transformer in series with an additional secondary winding of main transformer. When switch is closed, receiver is ''''on'''' with power supply operative and kinescope filament receiving full rated voltage comprising sum of secondary contributions. When switch is open, receiver is in ''''standby'''' condition- with power supply inoperative, but kinescope filament energized at reduced level representing contribution of auxiliary transformer secondary alone. In remote control embodiment, auxiliary transformer has additional secondary winding providing AC input to remote control receiver power supply.

公开(公告)号：US3862361A

公开(公告)日：1975-01-21

申请号：US42967373

申请日：1973-12-28

Applicant: RCA CORP

Inventor： GEORGE JOHN BARRETT

IPC: H04N5/14 ,  H04N5/213 ,  H04N5/455 ,  H04N5/44

CPC classification number: H04N5/455

Abstract: Synchronous video detection in a television receiver provides increased detection linearity and better signal-to-noise ratio for weak signals than does envelope video detection. Impulse noise, which produces generally unobtrusive black-going noise components in a picture reproduced in response to a video signal recovered by envelope detection from a negatively modulated carrier also produces obtrusive white-going noise components in a picture reproduced in a response to a video signal recovered by synchronous detection. Common signal processing means, responsive to the envelope of the video signal modulated intermediate frequency carrier, inverts the white-going noise impulses to produce black-going components so that substantially all noise impulses appear black-going in the recovered signal.

Abstract translation: 电视接收机中的同步视频检测对于弱信号而言，比包络视频检测提供更高的检测线性度和更好的信噪比。 脉冲噪声在响应于从负调制载波的包络检测恢复的视频信号再现的图像中产生通常不引人注意的黑噪声分量，还在对视频信号的响应中再现的图像中产生突出的白噪声分量 通过同步检测恢复。 公共信号处理装置响应于视频信号调制的中频载波的包络，将白噪声的脉冲反相以产生黑色分量，使得基本上所有的噪声脉冲在恢复的信号中显现为黑色。

公开(公告)号：US3651409A

公开(公告)日：1972-03-21

申请号：US3651409D

申请日：1970-03-23

Applicant: RCA CORP

Inventor： GEORGE JOHN BARRETT ,  HILLIKER STEPHEN EARL

IPC: H03B5/18 ,  H04B1/26

CPC classification number: H03B5/1847

Abstract: An ultra high frequency (UHF) tuner includes a plurality of tunable transmission lines formed on a dielectric plate. At least two of the transmission lines are tunable over different bands of frequencies and each includes first and second conductive sections, coupled by voltage responsive capacitance devices, disposed on one surface of the dielectric plate, and a conductive ground plane disposed on the other surface overlying the first and second sections. One end of the first section of each of the transmission lines is connected to the ground plane and is shaped to provide tracking as the transmission lines are tuned across their respective frequency bands. An adjustable inductor serially connected with the variable capacitance devices also provides a tracking adjustment between the circuits.

Abstract translation: 超高频（UHF）调谐器包括形成在电介质板上的多个可调谐传输线。 传输线中的至少两条可在不同的频带上调谐，并且每个传输线包括设置在电介质板的一个表面上的电压响应电容器件耦合的第一和第二导电部分，以及设置在另一表面上的导电接地平面 第一和第二部分。 每个传输线的第一部分的一端连接到接地平面，并且被成形为当传输线在其各自的频带上调谐时提供跟踪。 与可变电容器件串联连接的可调整电感器也可在电路之间进行跟踪调节。

公开(公告)号：US3924192A

公开(公告)日：1975-12-02

申请号：US47608174

申请日：1974-06-03

Applicant: RCA CORP

Inventor： GEORGE JOHN BARRETT

IPC: H03J5/02 ,  H03J7/28 ,  H04B1/32

CPC classification number: H03J5/0245 ,  H03J7/28

Abstract: A television tuning system wherein voltage tunable tuners are supplied with a tuning voltage suitable for receiving a particular selected channel. The tuning voltage is produced by a sweep generator. A harmonic generator produces harmonically related reference signals at frequencies corresponding to television channel oscillator frequencies. A frequency discriminator produces an output representative of frequency differences between the oscillator signal and each of the harmonically related signals as said tuning is varied. A counter coupled to the discriminator produces an output count representative of the oscillator signal passing through a predetermined frequency relationship with respect to each of the harmonically related signals. A channel selector produces a stored count representative of a selected television channel. A comparator provides a hold signal to the sweep generator in response to a match between the output count and the stored count. A decoder identifies the presence of a first and a second particular output count. A band switch produces a signal to condition the voltage tunable tuners for reception of a first band of radio frequencies when the output count is less than or equal to a first particular count and to condition the voltage tunable tuners for reception of a second band of radio frequencies when the output count is greater than the first particular count. The band switch also conditions the voltage tunable tuners for reception of a third band of radio frequencies when the output count is greater than the second particular count. The sweep generator is reset, in response to a match between the output count and the first or second particular count, to a condition suitable for initiating variation of the tuning of the local oscillators through a fifth or sixth band of frequencies, respectively.

Abstract translation: 一种电视调谐系统，其中电压可调谐调谐器被提供有适于接收特定选定通道的调谐电压。 调谐电压由扫描发生器产生。 谐波发生器在对应于电视频道振荡器频率的频率处产生与谐波相关的参考信号。 当所述调谐变化时，鉴频器产生表示振荡器信号和每个谐波相关信号之间的频率差的输出。 耦合到鉴频器的计数器产生表示相对于每个谐波相关信号经过预定频率关系的振荡器信号的输出计数。 信道选择器产生代表所选电视频道的存储计数。 响应于输出计数和存储的计数之间的匹配，比较器向扫描发生器提供保持信号。 解码器识别第一和第二特定输出计数的存在。 当输出计数小于或等于第一特定计数时，频带开关产生信号以调节电压可调谐调谐器以接收第一波段频率，并且调节电压可调谐调谐器以接收第二频带无线电 当输出计数大于第一个特定计数时的频率。 当输出计数大于第二特定计数时，频带开关还调节用于接收第三频带频带的电压可调谐调谐器。 响应于输出计数和第一或第二特定计数之间的匹配，扫描发生器被复位到适于分别通过第五或第六频带启动本地振荡器的调谐变化的条件。

公开(公告)号：US3898567A

公开(公告)日：1975-08-05

申请号：US47608474

申请日：1974-06-03

Applicant: RCA CORP

Inventor： GEORGE JOHN BARRETT

IPC: H03J5/02 ,  H04B1/16

CPC classification number: H03J5/0245

Abstract: A tuning system for tuning regularly spaced and irregularly spaced channel frequencies wherein a plurality of harmonically related frequency signals separated by the regular channel spacing are utilized as reference signals. A sample of the tuner local oscillator signal is either compared directly in a frequency discriminator with the reference signals when regularly spaced channel frequencies (e.g., 6 MHz apart) are to be selected, or is translated in frequency prior to comparison in the discriminator when irregularly spaced channel frequencies are to be selected. When the irregularly spaced channel frequencies are being received, an auxiliary oscillator operating at a fixed frequency (e.g., (6N + 4) MHz where N is any integer) is mixed with the sample of the tuner local oscillator signal to develop a translated sample of the oscillator signal. Furthermore, the local oscillator signal itself is frequency shifted (e.g., by +4 MHz) to the irregular frequency. The translated sample of the oscillator signal (but not the oscillator signal) will therefore differ in the same manner from a harmonic of the regular channel spacing as the regular spaced channel frequencies.

Abstract translation: 用于调谐规则间隔和不规则间隔的通道频率的调谐系统，其中由常规信道间隔分离的多个谐波相关频率信号被用作参考信号。 当选择规则间隔的信道频率（例如，6MHz的间隔）时，调谐器本地振荡器信号的样本直接在频率鉴别器中与参考信号进行比较，或者在不规则地在鉴别器中进行比较之前以频率转换 要选择间隔的通道频率。 当正在接收不规则间隔的信道频率时，以固定频率（例如（6N + 4）MHz（N为任何整数））运行的辅助振荡器与调谐器本地振荡器信号的样本混合，以开发翻译的样本 振荡器信号。 此外，本地振荡器信号本身被频移（例如，+4MHz）到不规则频率。 因此，振荡器信号（但不是振荡器信号）的转换样本将以与正常信道间隔的谐波相同的方式与正常间隔的信道频率不同。

公开(公告)号：US3688198A

公开(公告)日：1972-08-29

申请号：US3688198D

申请日：1971-04-14

Applicant: RCA CORP

Inventor： GEORGE JOHN BARRETT

IPC: H03G3/30 ,  H04B1/28

CPC classification number: H03G3/3052

Abstract: A television receiver includes VHF and UHF tuners, each having a separate radio frequency amplifier. The AGC control voltage developed in the receiver and used for VHF gain control is adapted to control the gain of the UHF tuner and to otherwise accommodate the different gain characteristics of the UHF amplifier.

Abstract translation: 电视接收机包括VHF和UHF调谐器，每个具有单独的射频放大器。 在接收机中开发并用于VHF增益控制的AGC控制电压适用于控制UHF调谐器的增益，否则适应UHF放大器的不同增益特性。

公开(公告)号：US3624554A

公开(公告)日：1971-11-30

申请号：US3624554D

申请日：1970-03-23

Applicant: RCA CORP

Inventor： HILLIKER STEPHEN EARL ,  GEORGE JOHN BARRETT

IPC: H03B5/18

CPC classification number: H03B5/1847

Abstract: An ultrahigh frequency oscillator utilizes tunable transmission lines as a frequency determining network. The circuit includes a dielectric plate having a conductive section disposed on a first plate face opposed on the second plate face by a conductive ground plane. The oscillator active device has one of its electrodes coupled to a first point located on the conductive section and another of its electrodes coupled to a point on the ground plane located directly opposite the first point. A window may be provided in the ground plane with conductive areas disposed within the window area. The conductive areas provide circuit capacitances for the oscillator.