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12. 发明专利

JPS5720038A GATE DRIVING CIRCUIT OF SAMPLING QUARTZ LOCKING CIRCUIT 失效
公开(公告)号：JPS5720038A
公开(公告)日：1982-02-02
申请号：JP9531380
申请日：1980-07-10
申请人： SANYO ELECTRIC CO
发明人： IMAMURA EIGO
IPC分类号： H03L7/18 , H03J7/28 , H03L7/10 , H03L7/20 , H04B1/26
摘要： PURPOSE:To prevent the generation of a displeasing sound by locking local oscillations at a prescribed frequency, by setting the conduction time of a gate circuit freely to more than the transient response time of the loop of a sampling quartz locking circuit. CONSTITUTION:Between the output terminal 10 of a phase comparator, provided in the loop of a sampling quartz locking circuit, and an earth E, an HPF11 is connected and at the output side of the HPF11, a gate circuit 9 composed of an FETQ1 is provided. Further, an operational amplifier OP as an LPF and DC amplifier is provided between the circuit 9 and a VCO. Further, a gate driving circuit is composed of the HPF11, a rectifying circuit 14 and a gate driving transistor TRQ2; and a series circuit of a capacitor C6 and a resistance R11 is connected betwen the collector and emitter of the TRQ2, and a resistance R12 for a voltage drop is connected to th emitter of the TRQ2. The time when the circuit 9 conducts as a local frequency during channel selection approximates to a desired frequency is set longer than the transient response time of the loop to lock oscillations at the desired frequency.

13. 发明专利

JPS5336129A MEMORY CONTENT DISPLAY UNIT OF TUNING MEMORY 失效
公开(公告)号：JPS5336129A
公开(公告)日：1978-04-04
申请号：JP11107876
申请日：1976-09-14
申请人： SANYO ELECTRIC CO
发明人： IMAMURA EIGO
IPC分类号： H03J7/28 , H04B1/16 , H04B1/26
摘要： PURPOSE:The luminous element for displaying the stored contents of a tuning memory and luminous element for displaying the receiving channel are provided to facilitate the preset operations, thereby precluding the possibility of mistaking the correspondence between the receiving channel and the stored contents of the memory.

17. 发明专利

JPS58121868A ADAPTOR FOR ANTENNA CONNECTION 失效
公开(公告)号：JPS58121868A
公开(公告)日：1983-07-20
申请号：JP439082
申请日：1982-01-13
申请人： SANYO ELECTRIC CO
发明人： IMAMURA EIGO
IPC分类号： H04N5/64 , H04N5/775
摘要： PURPOSE:To attain an adaptor constituted freely attachably and removably with an antenna connection terminal of a VTR, by providing a connection terminal for the antenna and a television receiver and an antenna changeover switch. CONSTITUTION:An adaptor A supplies a VHF input from the antenna to a VTRB and a relay R at all times, and the relay R switched with a switching signal supplies the VHF input from the antenna and that from the VTR to the television receiver selectively. In removing the adaptor A from the VTRB, since no switching signal is inputted, the relay R is connected to an antenna TA to attain the VHF broadcast signal of the TV receiver, and when the adaptor A is connected to the VTRB and the said VTRB is reproduced, a switching signal is given and the reproduced video signal with RF conversion is applied to the TV receiver.

18. 发明专利

JPS5846722A INITIAL RESET DRIVING CIRCUIT OF CHANNEL SELECTING DEVICE 失效
公开(公告)号：JPS5846722A
公开(公告)日：1983-03-18
申请号：JP14427881
申请日：1981-09-11
申请人： SANYO ELECTRIC CO
发明人： IMAMURA EIGO
IPC分类号： H03J5/02 , H03K17/22
摘要： PURPOSE:To set a prescribed initial channel in an assured way, by setting the initial reset terminal of an IC at an earth level earlier than the power supply input terminal when a power supply switch is changed to OFF from ON. CONSTITUTION:A diode 8 and the 1st capacitor C6 are connected in series between an earth and a DC power supply line 2 connected to a power supply switch 7. The point of this connection is connected to a pin 14 of the power supply input terminal of a channel selecting IC1. Furthermore a resistance R15 and the 2nd capacitor C3 are connected in series between the line 2 and the earth, and the point of this connection is connected to channel shift down/up pins 15 and 16. The capacitor C3 is discharged in a route of the C3-R15-line 2. While the capacitor C6 is discharged from the C3 through the reverse resistance of the diode 8 and the line 2. Thus the discharge time constant of the latter is larger than the former.

19. 发明专利

JPS562741A RELOCK CIRCUIT OF SAMPLING QUARTZ LOCK CIRCUIT 失效
公开(公告)号：JPS562741A
公开(公告)日：1981-01-13
申请号：JP7955179
申请日：1979-06-22
申请人： SANYO ELECTRIC CO
发明人： IMAMURA EIGO , MASUHARA MASAMI
IPC分类号： H03J7/28 , H03L7/10 , H03L7/113 , H03L7/20 , H04B1/26
摘要： PURPOSE:To make a channel reselection operation unnecessary, by leading an oscillation frequency into a capture range forcedly for switching of a function change-over switch, electric power resupply, and so on. CONSTITUTION:The output terminal of gate transistor TrQ3 is connected to one input terminal of voltage comparator OP1, which constitutes an LPF, through resistance R2 to lead the output from the FM detector, which is not shown in the figure, to the input side of voltage comparator OP2. Two-system control circuits 9 and 10 which are provided in the output side of comparator OP2 and generate outputs of levels opposite to each other for the output from the tuning center point are connected to the input terminal of TrQ3, and capacitor C4 which is charged for switching of switches such as function change-over switch 15 and power source switch S1' and flows a current to TrQ3 in the charging time is provided at the control terminal of TrQ3. As a result, the oscillation frequency can be led into the capture range forcedly for switching of switch 15 and power resupply to make the channel reselection operation unnecessary.

20. 发明专利

JPS5289012A BAND SWITCHING CIRCUIT FOR PLURAL BAND RECEIVER 失效
公开(公告)号：JPS5289012A
公开(公告)日：1977-07-26
申请号：JP627176
申请日：1976-01-19
申请人： SANYO ELECTRIC CO
发明人： IMAMURA EIGO
IPC分类号： H03J7/28 , H03J5/24 , H03K17/00 , H04B1/26 , H04H20/00 , H04H40/18
摘要： PURPOSE:To promote the reduction of the parts and the simplification of circuit constitution with switching the N pieces of band by adding control input to the N - 1 pieces of switching element.

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