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31. 发明专利

JPH04208704A LOCK DETECTING CIRCUIT 失效
公开(公告)号：JPH04208704A
公开(公告)日：1992-07-30
申请号：JP40006990
申请日：1990-12-01
申请人： SANYO ELECTRIC CO
发明人： MEYA MASATO
IPC分类号： H04S7/00 , H03G3/02 , H03G3/10 , H04H1/00 , H04H40/36
摘要： PURPOSE:To prevent the malfunction due to noise by discriminating whether the state is changed plural times within a certain time or not to detect the lock state of an up/down counter. CONSTITUTION:The state change of the output signal of a direction data generating circuit 27 synchronized with a clock signal is detected by a state change detecting circuit 29. If the state change sporadically occurs by the malfunction of the up/down counter due to noise, the state change is intermittently counted by a counting circuit 30 at intervals, and the time is required till the occurrence of a count completion signal. Therefore, a timing signal is generated from a timing set signal 32 kept in the waiting state to reset the counting circuit 30 and an RS-FF 31. As the result, a gate circuit 33 goes to the cut-off state and the counting circuit 30 is cleared, and therefore, the lock state is not discriminated and the circuit is returned to the initial state.

36. 发明专利

JPH0464971A MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH0464971A
公开(公告)日：1992-02-28
申请号：JP17655190
申请日：1990-07-03
申请人： MITSUBISHI ELECTRIC CORP
发明人： OGAWA HISANORI
IPC分类号： H04S1/00 , G11B20/02 , H04H1/00 , H04H40/36
摘要： PURPOSE:To simultaneously record audio signals of plural systems by mixing and recording Lch and Rch audio signals inputted from plural audio input terminals in the mixture ratio set by a mixture ratio varying circuit. CONSTITUTION:The RF signal inputted to an antenna 1 is decoded to stereo signals or audio multiple signals, and they are outputted from an Lch output terminal 3 and an Rch output terminal 4. Further, they are outputted to an Lch switching circuit 20 and an Rch switching circuit 21. Outputs of Lch input terminals 7 and 9 of external inputs are mixed in the mixture level set by a variable resistor 17 by an Lch mixing circuit 16. Outputs of Rch input terminals 8 and 10 of external inputs are mixed in the same manner. They are amplified by a recording amplifier 14 and are recorded on a magnetic tape around a rotating drum 15. The same operation is performed in the non-mixing audio mode also.

38. 发明专利

JPH03226020A AM/FM STEREO RECEIVER AND AM STEREO/FM STEREO RECEIVER 失效
公开(公告)号：JPH03226020A
公开(公告)日：1991-10-07
申请号：JP2008290
申请日：1990-01-30
申请人： SONY CORP
发明人： YAMAZAKI DAISUKE
IPC分类号： H04B1/16 , H04H1/00 , H04H40/36 , H04H40/45
摘要： PURPOSE:To decrease the circuit scale by controlling an oscillating frequency of a variable oscillator based on a phase comparison output from an FM orthogonal synchronizing detector at the reception of an FM broadcast and based on a phase comparison output from an AM orthogonal synchronizing detector at the reception of an AM broadcast. CONSTITUTION:An AM orthogonal synchronizing detector 4 acts like a phase comparator and constitutes an AM PLL circuit 17 together with a low pass filter 5 of a PLL circuit 19, a voltage controlled oscillator 6 and a 1/8 frequency divider 7 of a frequency division circuit 16. Moreover, an FM orthogonal synchronizing detector 11 acts like a phase comparator and constitutes an FM PLL circuit 18 together with the voltage controlled oscillator 6, 1/8, 1/6, 1/4 frequency dividers 7, 12, 13 of the frequency division circuit 16 and a low pass filter 5. Since the voltage controlled oscillator 6, the 1/8 frequency divider 7 and the low pass filter 5 of the PLL circuit 19 are used in common in this way, the circuit scale is made small regardless of the integration of the AM (AM stereo) receiver and the FM stereo receiver.

39. 发明专利

JPH03218185A RECEIVER 失效
公开(公告)号：JPH03218185A
公开(公告)日：1991-09-25
申请号：JP1444690
申请日：1990-01-23
申请人： FUJITSU GENERAL LTD
发明人： MATSUZAKI MOTOYASU
IPC分类号： H04N5/60 , H04H1/00 , H04H40/36
摘要： PURPOSE:To simultaneously output stereo sound and the 2nd sound(SAP) by using stereo left-right sound sum (L+R) signal circuits as main channel common circuits for stereo sound broadcasting and SAP broadcasting and separating stereo sound difference (L-R) signal circuits for a subchannel from plural SAP subsound circuits. CONSTITUTION:The stereo left-right sound gum (L+R) signal circuits 3, 4 are used as the main channel common circuits for stereo sound broadcasting and SAP broadcasting, the stereo left-right sound difference (L-R) signal circuits 5, 6 for the subchannel of stereo sound broadcasting are separated from the subsound signal circuits 8 to 10 for an SAP sound signal and output matrix circuits 7, 11 also are independently driven. Consequently, the stereo sound broadcasting and the 2nd sound (SAP) broadcasting can be simultaneously outputted.

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