专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明专利

JP2005159714A Delay apparatus, power supply apparatus, and signal delaying program 有权
标题翻译：延迟设备，电源设备和信号延迟程序
公开(公告)号：JP2005159714A
公开(公告)日：2005-06-16
申请号：JP2003395232
申请日：2003-11-26
申请人： Densei Lambda Kk , デンセイ・ラムダ株式会社
发明人： KOMATSUZAKI YOSHIHIRO
IPC分类号： G11C7/00 , G11C11/00 , H02J7/00 , H03K5/13 , H03K9/00
CPC分类号： H03K5/13
摘要： PROBLEM TO BE SOLVED: To provide a delay apparatus with high resolution without increasing the circuit scale. SOLUTION: The delay apparatus (delay circuit 10) for inputting a signal with periodicity and outputting the signal with a delay by a prescribed time T 0 is provided with: a sampling circuit (A/D converter 11) for sampling the signal at a prescribed period T S ; a storage circuit (RAM 14) for storing data sampled within a prescribed time in the past by the sampling circuit; and an estimate circuit (DSP 12) for estimating the value of a signal before the prescribed time T 0 from a certain point of time and at a point of time between samplings from the data stored in the storage circuit. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供具有高分辨率的延迟装置，而不增加电路规模。＆lt; P＆gt;解决方案：用于输入具有周期性的信号并将信号延迟预定时间T 0 的延迟装置（延迟电路10）设置有：采样电路（A / D 转换器11），用于在规定的时间段T ~~0 之前的信号的值。版权所有（C）2005，JPO＆NCIPI~~

3. 发明专利

JP2005136830A Frequency converting circuit, radio frequency receiver, and radio frequency transceiver 有权
标题翻译：频率转换电路，无线电频率接收机和无线电频率收发器
公开(公告)号：JP2005136830A
公开(公告)日：2005-05-26
申请号：JP2003372535
申请日：2003-10-31
申请人： Sharp Corp , シャープ株式会社
发明人： ADAN ALBERT O , KAMIYA SHINJI
IPC分类号： H03D7/00 , H03D7/14 , H03D7/18 , H03K9/00 , H04B1/16 , H04B1/26 , H04B1/40
CPC分类号： H04B1/408 , H03D7/1441 , H03D7/1458 , H03D7/1466 , H03D7/165 , H03D2200/0084
摘要： PROBLEM TO BE SOLVED: To provide a frequency converting circuit, a radio frequency receiver, and a radio frequency transceiver, which are integrated into an integrated circuit, and made in a smaller size.
SOLUTION: A first mixer 204 is provided for mixing the radio frequency signal of a frequency f
RF with the first local oscillation signal 205 of a frequency f
LO1 so as to downconvert the radio frequency signal of a frequency f
RF into an intermediate frequency signal. Two mixers 207A and 207B are provided for mixing the intermediate frequency signal outputted from the first mixer 204 with two second local oscillation signals 208 having a mutually distinct phase at a frequency f
LO2 , so as to downconvert the intermediate frequency signal into two baseband signals 209A and 209B having a mutually distinct phase. The phases of the two second local oscillation signals 208 are set to 0° and 270°, respectively. In addition, relations expressed by equations f
LO1 =k×f
RF (k>1), f
LO2 =f
LO1 /m(m>1) and k=m/(m-1) are met.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供集成到集成电路中并制成较小尺寸的频率转换电路，射频接收器和射频收发器。解决方案：提供第一混频器204，用于将频率f RF 的射频信号与频率f LO1 的第一本地振荡信号205进行混频，以便将频率f RF 的射频信号下变频成中频信号。提供两个混频器207A和207B，用于将从第一混频器204输出的中频信号与在频率f LO2 具有相互不同相位的两个第二本地振荡信号208进行混频，以便将中间频率信号分成具有相互不同相位的两个基带信号209A和209B。两个第二本地振荡信号208的相位分别设定为0°和270°。另外，由等式f = k×f （k> 1）表示的关系，f LO2 = f LO1 < / SB> / m（m> 1）和k = m /（m-1）。版权所有（C）2005，JPO＆NCIPI

4. 发明专利

JP2002526981A 失效
公开(公告)号：JP2002526981A
公开(公告)日：2002-08-20
申请号：JP2000573052
申请日：1999-09-01
IPC分类号： H03H17/00 , H03H17/02 , H03K9/00 , H04B1/16 , H04J11/00 , H04L25/03

5. 发明专利

JP2000156666A CARRIER DETECTION CIRCUIT AND COMMUNICATION EQUIPMENT 失效
公开(公告)号：JP2000156666A
公开(公告)日：2000-06-06
申请号：JP32860998
申请日：1998-11-18
申请人： NEC CORP
发明人： SAKUMA SHIGERU
IPC分类号： H04J3/00 , H03K9/00 , H04B1/10 , H04B1/16 , H04B17/00 , H04B17/318 , H04K1/00 , H04L20060101 , H04Q7/22
摘要： PROBLEM TO BE SOLVED: To provide the carrier detection circuit that detects a carrier at a high speed while preventing mis-detection of the carrier. SOLUTION: An RSSI block integration circuit 101 that receives an RSSI signal converted into a digital signal through A/D conversion calculates the RSSI signal at a low level, an RSSI level addition circuit 103 adds a prescribed level to the low level, and a comparator circuit 104 compares the threshold value resulting from the output of the circuit 103 with an RSSI signal that is sequentially integrated with an RSSI moving integration circuit 102 to discriminate the presence of a carrier.

6. 发明专利

JP2000049662A DEMODULATING CIRCUIT OF CDMA RECEIVING DEVICE 失效
公开(公告)号：JP2000049662A
公开(公告)日：2000-02-18
申请号：JP21919998
申请日：1998-08-03
申请人： NEC CORP
发明人： KOMATSU MASAHIRO
IPC分类号： H04B1/707 , H03K9/00 , H04B7/01 , H04L1/20 , H04L7/00
摘要： PROBLEM TO BE SOLVED: To improve characteristics of frequency detection by performing correct transmission line estimation even in an interference or noisy state. SOLUTION: A transmission line amplitude and phase estimation part 105 finds as a transmission estimated value 301 an amplitude and phase estimation error due to variation of a transmission line through a transmission line amplitude and phase estimation part 105 by using a pilot symbol whose transmission pattern is already known among signals spread reversely by a reverse spreading filter 103. A reliability measurement part 106 finds the reliability of the transmission line estimation value 301. An interpolation part 107 generates a phase compensation vector by changing interpolating methods according to the reliability. Then a synchronous detection part 108 compensates the amplitude and phase error of the information symbol with the receive phase vector and performs synchronous detection.

7. 发明专利

JP2982797B1 失效
公开(公告)号：JP2982797B1
公开(公告)日：1999-11-29
申请号：JP21919998
申请日：1998-08-03
申请人： NIPPON DENKI KK
发明人： KOMATSU MASAHIRO
IPC分类号： H04B1/707 , H03K9/00 , H04B7/01 , H04L1/20 , H04L7/00

8. 发明专利

JPH11234144A METHOD AND DEVICE FOR RE-ENCODING DECODED DATA 失效
公开(公告)号：JPH11234144A
公开(公告)日：1999-08-27
申请号：JP21189098
申请日：1998-07-09
申请人： MOTOROLA INC
发明人： THEODORE A TROST , TERRY M SCHAFFNER
IPC分类号： H03M13/23 , H03K9/00 , H03M13/27 , H03M13/12 , H03M13/22
摘要： PROBLEM TO BE SOLVED: To efficiently generate a re-encoding history data bit by convolution- encoding each data bit of a data clock to a branch word for transmission, fixing the required number of re-encoding history data bits based on the position of the decoded branch word and selecting the combination of the data bits for a previously decoded data bit sequence. SOLUTION: A most likely decoder 100 receives and decodes a matrix 102 interleaved with plural branch words. Each time of decoding one of the branch words, a composite data but is shifted into a sequence to generate a history data bit sequence as data 107. A re-encoding history data bit generator 101 selects the combination of data bits at a prescribed position within the history data bit sequence with respect to the position of a decoded data but finally shifted into the sequence, re-encodes the selected combination and outputs it as the re-encoding history data bit.

9. 发明专利

JPH05336184A 失效
公开(公告)号：JPH05336184A
公开(公告)日：1993-12-17
申请号：JP14378892
申请日：1992-06-04
申请人： NEC CORP
发明人： ANZAI MUTSUMI
IPC分类号： H03K9/00 , H04L27/22
摘要： PURPOSE:To provide the demodulator used for the digital carrier transmission system employing phase modulation in which clock phase is controlled independently at every channel so as to hold the identification timing of a regenerative signal in optimum state, for both the channels. CONSTITUTION:A clock frequency component 52 is extracted by passing demodulation base band signals a, b through nonlinear circuits 7, 8 and a band pass filter 11 and a demodulated clock signal 53 synchronized with the clock frequency component 52 extracted by a PLL circuit comprised of a phase comparator 12 and a voltage controlled oscillator 13 is obtained and the phase is adjusted by voltage controlled oscillators 14, 15 to obtain sampling signals 50, 51. A deviation of an identification timing for each channel from an eye convergence point detected based on digital signals c, d of A/D converters 9, 10 by using eye detectors 16, 17, the phase of the sampling signals 50, 51 is controlled to always optimize the identification timing of both the channels.

10. 发明专利

JPH0326570B2 失效
公开(公告)号：JPH0326570B2
公开(公告)日：1991-04-11
申请号：JP6138483
申请日：1983-04-07
申请人： MURATA MANUFACTURING CO
发明人： YAMAMOTO TAKASHI , KITAJIMA TAKAMICHI
IPC分类号： H03H9/17 , H03H9/02 , H03K9/00

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