公开(公告)号：JPS62130090A

公开(公告)日：1987-06-12

申请号：JP27049285

申请日：1985-11-30

Applicant: SONY CORP

Inventor： OSADA YASUO ,  KAJIWARA TADASHI ,  MITA HIROYUKI

IPC: H04N7/20 ,  H04B1/18 ,  H04B1/26 ,  H04B7/185 ,  H04N5/44

Abstract: PURPOSE:To improve a control effect on the image interference, the leakage of an output from a station and the multiwave interference by providing a filter part having band pass characteristic consisting of a high pass filter, an amplifier, and a low pass filter. CONSTITUTION:The high pass filter 20 is provided in a front state of the first IF amplifier 12 and the low pass filter 21 is provided in a back stage thereof, which are respectively constituted by a concentrated constant. They constitute the filter part having the band pass characteristic as a whole. The respective filters 20, 21 have tunable forms in which a cut off frequency is changed accord ing to a receiving frequency. At the back part of the filter 21, the first IF amplifier 23 of the second stage is disposed, a fixed high pass filter 22 is dis posed at the front stage thereof, and a fixed low pass filter 24 is disposed at the rear stage, respectively. According to this constitution, the band pass characteristic becomes substantially a narrower band than a receiving band and a steep characteristic outside the band is obtained, and the control effect on the image interference, the leakage of the output from the station and the multiwave interference can be improved.

公开(公告)号：JPS60176310A

公开(公告)日：1985-09-10

申请号：JP3194884

申请日：1984-02-21

Applicant: SONY CORP

Inventor： OSADA YASUO ,  TSURUMARU SHINOBU ,  YAMAMOTO TSUGUO

IPC: H03D3/00 ,  H03D3/06

Abstract: PURPOSE:To make higher a load impedance of a filter in a high band, and to improve a selectivity characteristic in the high band, too, by supplying a passing output of a tracking filter to a phase comparator through a coil for constituting a 90 deg. phase shifter. CONSTITUTION:An FM signal SFM inputted from an input terminal 37 is supplied to a tracking filter 39 through a limiter 38. This filter 39 is constituted of a single tuned amplifier circuit having a steep single peak response, a tuning frequency is changed, also a phase characteristic is varied linearly in the vicinity of the tuning frequency, and it is + or -90 deg. in the outside of the band. An output SFM' of this filter 39 is supplied to a 90 deg. phase shifter 40 constituted of a coil, and inputted to one input terminal of a phase comparator 41. As for this phase comparator 41, that which has a low input impedance is used so that it can be driven enough in the high band. Also, the output SFM of the limiter 38 is inputted to the other input terminal of the phase comparator 41.

公开(公告)号：JPS58171748A

公开(公告)日：1983-10-08

申请号：JP5289582

申请日：1982-03-31

Applicant: SONY CORP

Inventor： RI MASAO ,  OOHARA KENJI ,  YAMAMOTO YOSHINORI ,  TAKADA AKIRA ,  WATANABE HISANORI ,  OSADA YASUO

IPC: G11B15/10 ,  G11B15/44

Abstract: PURPOSE:To smplify the structure and to make the structure low-cost and small- sized, by using an electromagnet for the mechanical trigger of the mode switching start as well as the lock of a switched mode. CONSTITUTION:When electric power is supplied to an exciting coil 108 of an electromagnet 32 in the FWD mode, an FWD lever 34 is turned counterclockwise by a cam 93 which is moved together with an intermittent toothed gear as one body, and a head substrate 14 is moved forward in the direction of an arrow i' against a spring. The instant that the head substrate 14 reaches a forward movement position, and FWD locking lever 35 is turned clockwise by a spring 141. In accordance with this turning, an attracted part 112 of its tip 35a is moved to approach both ends 104a and 104b of the second yoke part 104 of an electromagnet 32, and the attracted part 112 is brought into closel contact with the part between both ends 104a and 104b of the second yoke 104 and is magnetically attracted strongly simultaneously with locking of the head substrate 14 which reaches the forward movement position.

公开(公告)号：JPS5669902A

公开(公告)日：1981-06-11

申请号：JP14567979

申请日：1979-11-09

Applicant: SONY CORP

Inventor： OSADA YASUO ,  NAKAGAWA TAKEYO ,  UTSUNOMIYA KIMITAKE

IPC: H01Q3/36 ,  H04B1/10 ,  H04B1/12 ,  H04N5/21

Abstract: PURPOSE:To eliminate a disturbing wave by providing two antennas equal in wave surface shape for a desired wave and dfferent in propagation path length for a disturbing wave and by mixing outputs of both the antenna into one. CONSTITUTION:Signals from antennas 1 and 2 are selected via switch 7; for example, the output of antenna 2 is supplied to difference synthesizing circuit 4 via variable phase shifter 5, and that of antenna 1 to difference synthesizing circuit 4 via phase correcting circuit 3. The coil of phase shifter 5 is compacted spirally on the printed substrate. Variable phase shifter 5 is controlled by a DC voltage superposed upon a high frequency signal and transmitted from the receiver via the feeder to form a null point to a disturbing wave.

公开(公告)号：JPS5582503A

公开(公告)日：1980-06-21

申请号：JP15713378

申请日：1978-12-19

Applicant: SONY CORP

Inventor： OSADA YASUO ,  KURIKI CHIYOUEI ,  NAKAGAWA TAKEYO

IPC: H04N5/21 ,  H01Q3/26 ,  H01Q3/36 ,  H04B1/10

Abstract: PURPOSE:To effectively reject the interference waves, by adjusting the voltage fed to the varactor element of the first or second phase shifter depending whether the control voltage is more than a given level or not. CONSTITUTION:The antennas 1a and 1b are provided on equi-wave surfaces for desired waves and on different propagation distance for interference waves, and the capacitive components of the output signal of the antennas 1a, 1b are fed to the variable phase shifters 4a, 4b of LPF type constituted with the varactor element of voltage control type. Further, the output signals of the phase shifters 4a and 4b are synthesized and picked up from the transmission path. In this case, DC control voltage is superimposed on the transmission line to separate the control voltage, and the voltage having a given amount level or more fed to the varactor element of the phase shifter 4a is adjusted, and it is fed to the varactor element of the phase shifter 4b when the level of the control voltage is less than a given amount to adjust the voltage. Thus, the interference waves can effectively be rejected.