公开(公告)号：US3876965A

公开(公告)日：1975-04-08

申请号：US47318974

申请日：1974-05-24

Applicant: SONY CORP

Inventor： KITAMURA NOBUO ,  TADAMA MOTOMU ,  WATANABE HIROAKI ,  SHIOTA TAKIZO ,  FURUYA SHIGEO ,  FUKAGAWA HIROSHI

IPC: H03J5/30 ,  H03J5/00

CPC classification number: H03J5/30

Abstract: A UHF-VHF combination tuner is provided with a rotatable turret having a plurality of tuning segments for receiving VHF and UHF signals, respectively, which are sequentially arranged around the turret for being selectively disposed at an operative position. Each tuning segment for the VHF signal includes at least an oscillating coil which, when the respective segment is at the operative position, forms part of a local oscillator provided for conversion of the respective VHF signal to an IF signal. Each tuning segment for the UHF signal includes a potentiometer which, when the respective segment is at the operative position, controls a variable reactance element of a local oscillator provided for conversion of the respective UHF signal to an IF signal. Further, the tuning segments have rotatable pinions by which the inductance of the oscillating coil or the voltage dividing ratio of the potentiometer may be varied, as the case may be, and a fine tuning device is provided with a drive gear adjacent the operative position for driving engagement with the pinion of the tuning segment selectively disposed at the operative position.

公开(公告)号：US3573830A

公开(公告)日：1971-04-06

申请号：US3573830D

申请日：1969-02-07

Applicant: SONY CORP

Inventor： TADAMA MOTOMU ,  AKIBA KOSUKE ,  DOI TOSHITADA ,  MIKKAICHI MASASHI ,  MORI TETSUYA ,  SATO RISABURO

IPC: H01Q9/16 ,  H01Q7/00

CPC classification number: H01Q9/16

Abstract: In a directional loop antenna, particularly for television receivers, in which a pair of arcuate conductive members are mounted in opposed relation with their concave sides facing each other to define a loop, a dummy load is connected between two of the adjacent ends of the conductive members and output terminals are connected to the opposite adjacent ends, the conductive members are formed with relatively narrow end portions and relatively wide middle portions to increase the frequency band width and gain of the antenna.