专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH09274539A DC OFFSET CANCEL CIRCUIT 失效
公开(公告)号：JPH09274539A
公开(公告)日：1997-10-21
申请号：JP10643096
申请日：1996-04-04
申请人： KOKUSAI ELECTRIC CO LTD
发明人： ENOMOTO KOUKI , HOSHINA TAKAYA , URABE KENZO
IPC分类号： G06F3/05 , H03M1/10 , H03M1/12
摘要： PROBLEM TO BE SOLVED: To eliminate the deviation of cancel quantity caused by a temperature change or any change with the passage of time at a circuit for canceling a DC component, which is generated at a receiver, contained in an intermittently received base band signal outputted from the high frequency reception part of a radio call receiver, converted digital and dispatched to a decoder part. SOLUTION: An analog base band signal outputted from the high frequency reception part is converted to a digital value by an A/D converter 1 and defined as one input of an adder 3, and the average moving amount of the DC component in that digital value is found by an average circuit 2. According to the information of intermittently received noise and significant blocks provided at a discrimination part 5, a control part 6 stores the average moving amount of the DC component in the noise block into a memory 4 and the significant block is canceled by inputting its stored value to the other side of the adder 3 for subtracting it.

2. 发明专利

JPH11122344A TELEPHONE SET 失效
公开(公告)号：JPH11122344A
公开(公告)日：1999-04-30
申请号：JP28094897
申请日：1997-10-14
申请人： KOKUSAI ELECTRIC CO LTD
发明人： ENOMOTO KOUKI , SASAYAMA TORU
IPC分类号： H04M1/57 , H04M1/65 , H04M1/658
摘要： PROBLEM TO BE SOLVED: To provide a telephone set by which a reply message changes with a telephone number of a received opposite party or with an entered password. SOLUTION: A reply message is registered corresponding to a received opposite party telephone number or an entered password, and in the case of receiving a call actually in the automatic answering telephone mode, a reply message corresponding to the opposite party telephone number or the like is sent to the opposite party or the phone call is transferred accordingly to send a proper reply message to the opposite party or the phone call is transferred properly to the opposite party.

3. 发明专利

JPH07282035A WEIGHTED MEAN CIRCUIT 失效
公开(公告)号：JPH07282035A
公开(公告)日：1995-10-27
申请号：JP9063394
申请日：1994-04-05
申请人： KOKUSAI ELECTRIC CO LTD
发明人： MIYATANI TETSUHIKO , ENOMOTO KOUKI , YAMAMOTO NARIYASU
IPC分类号： G06F7/53 , G06F7/52 , G06F7/523 , G06F17/10 , H03H17/00 , H03H17/04
摘要： PURPOSE:To reduce the number of multipliers, to simplify the circuit constitution and to shorten the response time in a weighted mean circuit. CONSTITUTION:A switch 5 changing over an input signal, an adder 6, a first register 7, a multiplier 8 and a second register 9, are provided. A signal from the first register 7 is fed back to the adder 6 and a signal from the multiplier 8 is polarity-inverted and is fed back to the adder 6 through the change-over switch 5. The second register 9 is constituted to output the signal from the multiplier 8. Output from the first register 7 and output from the multiplier 8 are polarity-inverted and they are fed back. Thus, the two kinds of the signals are fed back to the first register 7 and therefore the function of the multiplier is given. Then, the multiplier is saved.

4. 发明专利

JP2000287242A RADIO INFORMATION RECEIVER 失效
公开(公告)号：JP2000287242A
公开(公告)日：2000-10-13
申请号：JP8838299
申请日：1999-03-30
申请人： KOKUSAI ELECTRIC CO LTD
发明人： ENOMOTO KOUKI
IPC分类号： H04B1/16 , H04Q7/14
摘要： PROBLEM TO BE SOLVED: To enhance operability in a radio information receiver. SOLUTION: The radio information receiver is provided with a microphone 13 and a voice recognition section 14 and registers a user's voice to commands especially decided in advance. When the voice recognition section 14 recognizes a voice entry command such as 'news' and 'message', a CPU 11 extracts news or a message from a memory 12 and display it on an LCD 4. In the case that a 'next' command is entered, the 'news' or the 'message' is displayed through scrolling. When a 'save' or a 'delete' command is entered, the news or message being displayed is saved or deleted. Moreover, the receiver can similarly set the speaker tone volume and on/off switching of a vibrator ring tone.

5. 发明专利

JPH09247220A AUTOMATIC FREQUENCY CONTROL CIRCUIT 失效
公开(公告)号：JPH09247220A
公开(公告)日：1997-09-19
申请号：JP6899396
申请日：1996-03-01
申请人： KOKUSAI ELECTRIC CO LTD
发明人： ENOMOTO KOUKI , KAWAI HISATSUGU , HOSHINA TAKAYA , URABE KENZO
IPC分类号： H04L27/14 , H03J7/02 , H04B7/005
摘要： PROBLEM TO BE SOLVED: To make the bit error rate of a reproduced signal small by further reducing the frequency shift between a carrier frequency and a local oscillation frequency when a frequency-modulated received wave is demodulated and detected. SOLUTION: A comparing circuit 3 compares the demodulation output of a demodulating circuit 1 with the output of a decision circuit 2 and outputs its positive/negative sign. When the same positive/negative sign is outputted more than once successively, a digital filter 4 outputs an up signal or down signal to vary the value in a counter 5, and the value is converted by a D/A converter 6 into an analog value, which is used as the control voltage of a VCO 7. A frequency synthesizer 8 supplies a local oscillation signal based upon the output of the VCO 7 to the demodulating circuit.

6. 发明专利

JPH11355843A MOBILE TELEPHONE SET 失效
公开(公告)号：JPH11355843A
公开(公告)日：1999-12-24
申请号：JP17067898
申请日：1998-06-03
申请人： KOKUSAI ELECTRIC CO LTD
发明人： ENOMOTO KOUKI
IPC分类号： H04W4/04 , H04W68/00 , H04Q7/38
摘要： PROBLEM TO BE SOLVED: To eliminate the troubles for a user during vehicle driving to make call reception processing through depression of a call reception key of a mobile telephone set, when an incoming call comes to the mobile telephone set mounted on an automobile that is driven. SOLUTION: For example, a transmission reception section 12 of the portable telephone set 1 sends/receives a voice signal via an antenna 11 under the control of a CPU 19 and outputs a received voice from a loudspeaker 13 and transmits a voice signal picked up by microphone 14. A detection means is configured by the CPU 19 that detects a driving state of vehicle, based on number of revolutions of the engine of the automobile detected by an engine number of revolution detection section 18 energized with a battery of the vehicle via cables 4, 5 and a cigarette lighter adaptor section 2, and a communication start means 20 conducts call reception processing automatically corresponding to an incoming call to the telephone set 1 in a detected driving state. Furthermore, a power supply section 7 receives power from the battery 3 and a key entry section 15 accepts entry from the user and a display section 16 displays data.

7. 发明专利

JPH10178458A DEMODULATION CIRCUIT 失效
公开(公告)号：JPH10178458A
公开(公告)日：1998-06-30
申请号：JP35358596
申请日：1996-12-17
申请人： KOKUSAI ELECTRIC CO LTD
发明人： ENOMOTO KOUKI , URABE KENZO
IPC分类号： H03D1/22 , H04B1/26 , H04L7/00 , H04L7/08 , H04L27/152
摘要： PROBLEM TO BE SOLVED: To provide a demodulation circuit in which the eliminating effect of a frequency offset is prevented by the increase in the frequency offset resulting in increasing an offset component in a reception symbol wave thereby causing considerable distortion to a waveform of the reception symbol wave. SOLUTION: A frame synchronization detection circuit 14 detects a frame synchronizing signal and provides a detection signal (d) to a counter circuit 15 by using a time given to one frame for the period, the counter circuit 15 counts the time by an oscillation signal P from a voltage controlled oscillator 10 to provide a count N to an error detection circuit 16. The error detection circuit 16 obtains a difference between a reference count stored in advance and a moving mean value of the count N for a plurality of number of times, provides the voltage corresponding to the difference to the voltage controlled oscillator 10 as a control voltage V so as to approach the frequency of an oscillation signal P to the frequency when no frequency offset is present.

8. 发明专利

JPH08166907A LOCKED KEY COLLATION CIRCUIT 失效
公开(公告)号：JPH08166907A
公开(公告)日：1996-06-25
申请号：JP31168394
申请日：1994-12-15
申请人： KOKUSAI ELECTRIC CO LTD
发明人： ENOMOTO KOUKI , URABE KENZO
IPC分类号： G06F12/14 , G06F15/78 , G06F21/24 , G09C1/00 , H04L9/32
摘要： PURPOSE: To provide a locked key collation circuit whose safety degree is guaranteed by constituting the circuit in such a way that it cannot be accessed from an external part after data is written into an internal memory being the object of secrecy. CONSTITUTION: The locked key collation circuit is provided in an IC package 100. Peculiar random signal patterns emitted from an internal circuit 1 in the IC package 100 are set to be locked key signals, the locked key signals written into the internal memory 2 are transferred to a register 4 and the locked key signals transferred to the register 4 are collated with the locked key signals from the internal circuit 1 in a coincidence collation circuit 5. The coincidence collation circuit 5 outputs the signals to the gate 3, continues closing, sets the gate 3 to a deadlock state and denies access from the external part hereafter as long as the signals are matched.

9. 发明专利

JPH09331257A DC OFFSET CANCELING CIRCUIT 失效
公开(公告)号：JPH09331257A
公开(公告)日：1997-12-22
申请号：JP17075796
申请日：1996-06-11
申请人： KOKUSAI ELECTRIC CO LTD
发明人： HOSHINA TAKAYA , ENOMOTO KOUKI
IPC分类号： H03M1/10 , H04L25/06 , H04L27/22 , H04L27/38
摘要： PROBLEM TO BE SOLVED: To eliminate correction errors when the input level of a circuit which offsets DC components contained in base-band analog signals outputted front a high-frequency receiving section of a radio paging receiver is high. SOLUTION: Base-band analog signals are inputted to one side of a buffer 1 and amplified by means of an amplifier 2. An A/D converter 3 converts the analog signals into digital signals and inputs the digital signals to one side of an adder 5 and a level detector 4 monitors the value level of the digital signals. Then an averaging circuit 7 finds the running average value of the digital values. A control section 8 stores the running average value of the DC component of noise in a memory 9 in accordance with the information on whether the digital signals are in a noise section or a significant section obtained front a decision section 6 and the information from the level detector 4 and, when the data are in the significant section, offsets the DC offset by inputting the value stored in the memory 9 for subtraction when the detected level is low or corrects the DC deviation by adding a reference value to the value stored in the memory 9 by giving the stored value to another adder 11 and giving the sum to the other input of the buffer after converting the sum into an analog value when the detected level is high.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式