公开(公告)号：US3254306A

公开(公告)日：1966-05-31

申请号：US23911762

申请日：1962-11-21

Applicant: RCA CORP

Inventor： CARLSON DAVID J

IPC: H03D7/12 ,  H03G3/30

CPC classification number: H03G3/30 ,  H03D7/12 ,  H03G3/3052

公开(公告)号：US3253229A

公开(公告)日：1966-05-24

申请号：US22497362

申请日：1962-09-20

Applicant: RCA CORP

Inventor： CARLSON DAVID J

IPC: H03F1/14 ,  H03F1/16 ,  H03F1/56 ,  H03F3/191

CPC classification number: H03F1/16 ,  H03F1/14 ,  H03F1/565 ,  H03F3/191

公开(公告)号：US3163822A

公开(公告)日：1964-12-29

申请号：US7971560

申请日：1960-12-30

Applicant: RCA CORP

Inventor： CARLSON DAVID J ,  WATERS GEORGE B

IPC: H03J7/08 ,  H04N5/50

CPC classification number: H04N5/50 ,  H03J7/08

公开(公告)号：US3148331A

公开(公告)日：1964-09-08

申请号：US7431060

申请日：1960-12-07

Applicant: RCA CORP

Inventor： CARLSON DAVID J

IPC: H03D7/04

CPC classification number: H03D7/04

公开(公告)号：US2950383A

公开(公告)日：1960-08-23

申请号：US67963657

申请日：1957-08-22

Applicant: RCA CORP

Inventor： CARLSON DAVID J

IPC: H03D7/06

CPC classification number: H03D7/06

公开(公告)号：US2880282A

公开(公告)日：1959-03-31

申请号：US47245954

申请日：1954-12-01

Applicant: RCA CORP

Inventor： CARLSON DAVID J

IPC: H03J3/00

CPC classification number: H03J3/00

公开(公告)号：US2753456A

公开(公告)日：1956-07-03

申请号：US31652852

申请日：1952-10-23

Applicant: RCA CORP

Inventor： YUAN PAN WEN ,  CARLSON DAVID J

IPC: H03B5/10

CPC classification number: H03B5/10

公开(公告)号：CA946947A

公开(公告)日：1974-05-07

申请号：CA105066

申请日：1971-02-10

Applicant: RCA CORP

Inventor： CARLSON DAVID J

IPC: H03B5/18 ,  H05K1/02 ,  H05K1/18 ,  H05K3/22

Abstract: An ultra high frequency (UHF) tuner includes tunable transmission lines having two conductive sections disposed on one face of a dielectric plate opposite a conductive ground plane disposed on the other dielectric plate face. The transmission lines are tuned by variable capacitance devices coupled between the conductive section of each line. To minimize interaction between the two transmission lines, the conductive sections of the lines are disposed on opposite surfaces of the dielectric plate with like ends of the lines adjacent opposite edges of the plate.

公开(公告)号：CA790188A

公开(公告)日：1968-07-16

申请号：CA790188D

Applicant: RCA CORP

Inventor： THERIAULT GERALD E ,  CARLSON DAVID J

公开(公告)号：CA1029859A

公开(公告)日：1978-04-18

申请号：CA195682

申请日：1974-03-22

Applicant: RCA CORP

Inventor： CARLSON DAVID J ,  HILLIKER STEPHEN E

IPC: G11B9/00 ,  G11B9/06 ,  H04N5/93

Abstract: A video disc player, employing a stylus electrode to form a variable capacitance with a conductive disc coating, as geometry variations in the disc groove pass beneath the stylus, has a conductive stylus support arm which forms a transmission line with a surrounding arm housing of conductive material. The transmission line is capacity end loaded at the arm end remote from the stylus by a series combination of capacitances which include an air dielectric capacitor and a voltage variable capacitor. The air dielectric capacitor has a first set of plates suspended from the movable stylus support arm, and a second set of plates fixedly mounted on the housing and interleaved with the first set. The transmission line and associated capacitances form a tuned circuit with a resonant frequency subject to variation as the stylus-disc capacitance varies. The tuned circuit is excited with UHF oscillations from a fixed frequency oscillator operating at a frequency within an ISM-allocated band. As the resonant frequency of the tuned circuit varies, the resultant UHF oscillation amplitude variations are detected to recover the recorded information. A tuning control circuit responsive to the detector output adjusts the voltage variable capacitance to maintain a desired spacing between the oscillator output and the tuning range of the transmission line resonant circuit. The stylus support arm is subject to replacement in the housing without wiring disconnection or connection.