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    • 2. 发明申请
    • FRONT END CIRCUIT
    • 前端电路
    • US20100026906A1
    • 2010-02-04
    • US12521090
    • 2007-10-02
    • Taiwa Okanobu
    • Taiwa Okanobu
    • H04N5/50
    • H04N5/4446H03G3/3068H03J1/005H03J3/06H03J5/244H03J2200/10H04N5/50H04N5/52H04N21/4263H04N21/4305
    • An IC of a front end circuit which can be ready for various television broadcasting systems is provided. The front end circuit includes tuning circuits 12A to 12C and 14A to 14C and high frequency amplifiers 13A to 13C individually corresponding to a plurality of reception bands of television broadcasts. The front end circuit further includes a switch circuit 11 for selectively supplying reception signals to the tuning circuits 12A to 12C, and a switch circuit 15 for selectively extracting outputs of the tuning circuits 14A to 14C. The front end circuit further includes mixer circuits 21I and 21Q to which an output of the switch circuit 15 is supplied, and a PLL 30 for supplying local oscillation signals SLOI and SLOQ having phases orthogonal to each other to the mixer circuits 21I and 21Q. The front end circuit further includes a complex band-pass filter 24 to which outputs of the mixer circuits 21I and 21Q are supplied, and an output circuit 25 for mathematically operating an output of the complex band-pass filter 24 and outputting an intermediate frequency signal SIF.
    • 提供了可以为各种电视广播系统准备的前端电路的IC。 前端电路包括分别对应于电视广播的多个接收频带的调谐电路12A至12C和14A至14C以及高频放大器13A至13C。 前端电路还包括用于向调谐电路12A至12C选择性地提供接收信号的开关电路11和用于选择性地提取调谐电路14A至14C的输出的开关电路15。 前端电路还包括提供开关电路15的输出的混频器电路21I和21Q以及用于向混频器电路21I和21Q提供彼此正交的相位的本地振荡信号SLOI和SLOQ的PLL30。 前端电路还包括混频电路21I和21Q的输出端提供的复合带通滤波器24和用于数学地操作复带通滤波器24的输出并输出中频信号的输出电路25 SIF。
    • 3. 发明申请
    • VARIABLE CAPACITANCE CIRCUIT
    • 可变电容电路
    • US20100019582A1
    • 2010-01-28
    • US12521219
    • 2007-10-02
    • Taiwa Okanobu
    • Taiwa Okanobu
    • H02M3/07
    • H03K17/687H03J5/246H03J2200/10
    • A switch circuit which can operate with a single low voltage is provided. A plurality of (i=0 to n) series circuits of a capacitor (Ci) and a path of the drain-source of a MOS-FET (Qi) are connected in parallel to each other between a first terminal T1 and a second terminal T0. In each of the series circuits, a pull-up resistor Ri is connected between an output terminal of an inverter Ai and a junction between the capacitor Ci and the MOS-FET (Qi). Each bit bi of digital data for controlling the capacitance is supplied to the gate of the MOS-FET (Qi) and the inverter Ai in each of the series circuits. Capacitance which varies in response to the value of the digital data is obtained between the first terminal T1 and the second terminal T0.
    • 提供可以以单个低电压工作的开关电路。 电容器(Ci)的多个(i = 0〜n)个串联电路和MOS-FET(Qi)的漏极源的路径在第一端子T1和第二端子 T0。 在每个串联电路中,上拉电阻器Ri连接在反相器A 1的输出端和电容器Ci与MOS-FET(Qi)之间的结点之间。 用于控制电容的数字数据的每个位bi被提供给每个串联电路中的MOS-FET(Qi)和反相器Ai的栅极。 在第一端子T1和第二端子T0之间获得响应于数字数据的值变化的电容。
    • 4. 发明授权
    • IC receiver to minimize tracking error
    • IC接收器尽量减少跟踪误差
    • US07505746B2
    • 2009-03-17
    • US11472262
    • 2006-06-21
    • Taiwa Okanobu
    • Taiwa Okanobu
    • H04B1/44H04B1/18H04B1/10H04B15/06
    • H04B1/005H04B1/0057H04B1/0075H04B1/0082H04B1/28H04B1/406
    • A multi-band receiver in which characteristics including a tracking error are improved is provided with a variable frequency oscillator circuit, a variable divider circuit (39) for dividing an oscillation signal (SVCO) of the variable frequency oscillator circuit, and mixer circuits (15I) and (15Q) for subjecting a received signal SRX to frequency conversion into an intermediate frequency signal (SIF) by a local oscillation signal (SLO). A divided output of the variable divider circuit (39) is supplied as the local oscillation signal (SLO) to each of the mixer circuits (15I) and (15Q). When a signal in a first frequency band is received, the division ratio n of the variable divider circuit (39) and the oscillation frequency of the variable frequency oscillator are changed to change the reception frequency in the first frequency band. When a signal in a second frequency band is received, at least the oscillation frequency of the variable frequency oscillator circuit is changed to change the reception frequency in the second frequency band.
    • 提供了包括跟踪误差的特性得到改善的多频带接收机,其具有可变频率振荡电路,用于分频变频振荡电路的振荡信号(SVCO)的可变分频电路(39)和混频电路(15I )和(15Q),用于通过本地振荡信号(SLO)对接收信号SRX进行频率转换成中频信号(SIF)。 可变分频器电路(39)的分频输出作为本地振荡信号(SLO)提供给混频电路(15I)和(15Q)。 当接收到第一频带中的信号时,改变可变分频器电路(39)的分频比n和可变频率振荡器的振荡频率以改变第一频带中的接收频率。 当接收到第二频带中的信号时,至少改变可变频率振荡器电路的振荡频率以改变第二频带中的接收频率。
    • 5. 发明授权
    • Receiving device and integrated circuit for reception
    • 接收装置和集成电路接收
    • US07362825B2
    • 2008-04-22
    • US11099931
    • 2005-04-06
    • Taiwa Okanobu
    • Taiwa Okanobu
    • H03K9/00
    • H04L27/2332H03D7/1433H03D7/1458H03D2200/0025
    • In order to improve various characteristics of a receiving circuit for digital radio services, circuits are provided for forming two local oscillation signals, whose frequencies are both the center frequency between a first ensemble and a second ensemble, and whose phases differ by 90° from each other. Furthermore, there are provided mixer circuits for frequency-converting the received signal into intermediate frequency signals in accordance with the local oscillation signals, phase-shift circuits to which the intermediate frequency signals are supplied, and an addition/subtraction circuit for performing one of addition and subtraction of the outputs of the phase-shift circuits. In addition, there are provided intermediate frequency filters to which the output signal of the addition/subtraction circuit is supplied and demodulation circuits to which the output signals of the intermediate frequency filters are supplied. By switching the process in the addition/subtraction circuit to addition or subtraction, the signals of the first ensemble and the second ensemble are selectively extracted from the demodulation circuits.
    • 为了改善用于数字无线电业务的接收电路的各种特性,提供了用于形成两个本地振荡信号的电路,它们的频率都是第一组合和第二组合之间的中心频率,并且其相位与每个振荡信号相位相差90° 其他。 此外,还提供了用于根据本地振荡信号将接收信号频率转换成中频信号的混频器电路,提供中频信号的相移电路和用于执行加法运算之一的加法/减法电路 并减去相移电路的输出。 此外,还提供了中频滤波器,加法/减法电路的输出信号被提供给中频滤波器,并且提供了中频滤波器的输出信号的解调电路。 通过将加法/减法电路中的处理切换到加法或减法,从解调电路中选择性地提取第一集合和第二集合的信号。
    • 6. 发明申请
    • AGC circuit
    • AGC电路
    • US20050221779A1
    • 2005-10-06
    • US11093416
    • 2005-03-30
    • Taiwa Okanobu
    • Taiwa Okanobu
    • H03G3/20H03G1/00H03G3/30H03G7/00H04B1/06H04B1/10H04B1/16H04B7/00H04B17/40H04B17/02
    • H03G3/3068H03G1/0023H03G1/0088H03G7/001H03G2201/103H03G2201/204H03G2201/305H03G2201/307H03G2201/506
    • An automatic gain control (AGC) circuit includes a number of attenuation circuits connected in series relative to a reception signal, a of variable gain amplifiers to which the reception signal and each output signal from the attenuation circuits are fed, respectively, a signal deriving circuit connected to output terminals of the variable gain amplifiers for deriving a level-controlled output signal, and a control current generating circuit for generating a control current having a predetermined characteristic out of first and second AGC voltages, wherein the control current outputted from the control current generating circuit is supplied to the variable gain amplifiers as a control signal for switching an operation thereof and for controlling a gain thereof, and a feedback control current corresponding to the control current is performed by the control current generating circuit.
    • 自动增益控制(AGC)电路包括相对于接收信号串联连接的多个衰减电路,分别馈送有来自衰减电路的接收信号和每个输出信号的可变增益放大器的信号导出电路 连接到可变增益放大器的输出端,用于导出电平控制的输出信号;以及控制电流产生电路,用于产生具有从第一和第二AGC电压起的预定特性的控制电流,其中从控制电流输出的控制电流 发电电路被提供给可变增益放大器作为用于切换其操作并用于控制其增益的控制信号,并且由控制电流产生电路执行与控制电流相对应的反馈控制电流。
    • 7. 发明授权
    • Receiver capable of receiving analog broadcast and digital broadcast and IC for the same
    • 接收机能够接收模拟广播和数字广播以及同样的IC
    • US06788747B1
    • 2004-09-07
    • US09663770
    • 2000-09-18
    • Taiwa Okanobu
    • Taiwa Okanobu
    • H04L2722
    • H04N5/4401H04B1/406H04H20/30H04H40/18H04N5/46H04N21/426H04N21/42638
    • A receiver equipped with first and second mixer circuits for performing frequency conversion of a received signal into two intermediate-frequency signals, phases of which are orthogonal to each other, by means of two local oscillation signals, and a plurality of filter circuits for taking the intermediate-frequency signals out of the output signals of the first and the second mixer circuits. The receiver is further equipped with a demodulation circuit for taking a signal indicating broadcast contents of an analog broadcast or a digital broadcast out of the intermediate-frequency signals taken out by the filter circuits. The frequencies of the local oscillation signals are made to be a frequency apart from the carried frequency of the received signal by the intermediate frequency of the intermediate-frequency signals at a time of receiving the analog broadcast, and the frequency of the local oscillation signals are made to be a frequency equal to the center frequency of the received signal at a time of receiving the digital broadcast.
    • 一种配备有第一和第二混频器电路的接收机,用于通过两个本地振荡信号将接收信号的频率转换成两个相位正交的两个中频信号,以及多个滤波电路, 第一和第二混频器电路的输出信号中的中频信号。 接收机还配备有解调电路,用于从由滤波器电路取出的中频信号中取出表示模拟广播或数字广播的广播内容的信号。 在接收到模拟广播时,本地振荡信号的频率被设定为与接收信号的承载频率不同的中频信号的中频,本地振荡信号的频率为 在接收数字广播时变为等于接收信号的中心频率的频率。
    • 8. 发明授权
    • Receiver
    • 接收器
    • US06714600B1
    • 2004-03-30
    • US09332717
    • 1999-06-14
    • Taiwa Okanobu
    • Taiwa Okanobu
    • H04L2706
    • H04H20/33H04H40/18H04H2201/17
    • A reception circuit 10 for receiving an analog broadcast and outputting an audio signal based on the analog broadcast includes a digital demodulation circuit 28 for digitally demodulating an intermediate frequency signal obtained in the reception circuit 10 at the reception time of the digital broadcast is and outputting the audio signal based on the digital broadcast, a control circuit 34 for controlling the operating power source voltage of the digital demodulation circuit 28, a detection circuit 31 for detecting the reception of the analog broadcast, and a detection circuit 32 for detecting the reception of the digital broadcast. only when the detection circuit 31 detects the broadcast wave signal of the analog broadcast at the station-selection time and the detection circuit 32 detects the broadcast wave signal of the digital broadcast, the operating power source voltage supplied to the digital demodulation circuit 28 by the control circuit 34.
    • 用于接收模拟广播并基于模拟广播输出音频信号的接收电路10包括数字解调电路28,用于数字解调在数字广播的接收时间在接收电路10中获得的中频信号,并输出 基于数字广播的音频信号,用于控制数字解调电路28的工作电源电压的控制电路34,用于检测模拟广播的接收的检测电路31,以及检测电路32的接收的检测电路32 数字广播。 只有当检测电路31在站选择时间检测到模拟广播的广播波信号并且检测电路32检测到数字广播的广播波信号时,由数字解调电路28提供的工作电源电压 控制电路34。
    • 9. 发明授权
    • Transmitting and receiving apparatus for incorporation into an
integrated circuit
    • 用于并入集成电路的发送和接收装置
    • US5758265A
    • 1998-05-26
    • US574383
    • 1995-12-18
    • Taiwa Okanobu
    • Taiwa Okanobu
    • H04B1/3822H04B1/40H04W84/10H04W88/00H04W88/02
    • H04B1/403
    • A transmitting and receiving apparatus configured in superheterodyne form, includes a receiving circuit for receiving a signal on one channel of a predetermined pair of channels and a transmitting circuit for transmitting a signal on the other channel of the predetermined pair of channels. The receiving circuit has a first voltage-controlled oscillator including a first oscillating transistor and generating a local oscillated signal used for receiving the signal on one of the channels, and a first current control means for controlling a collector current of the first oscillating transistor. The transmitting circuit has a second voltage-controlled oscillator including a second oscillating transistor and generating a signal of the frequency of the other channel, and a second current control means for controlling a collector current of the second oscillating transistor. The current control means corresponding to the voltage controlled oscillator generates a signal with a higher one of the frequencies of the predetermined pair of channels increases the collector current of the corresponding oscillating transistor.
    • 以超外差形式配置的发送和接收装置包括:接收电路,用于在预定的一对信道的一个信道上接收信号;以及发送电路,用于在预定的一对信道的另一个信道上发送信号。 接收电路具有包括第一振荡晶体管的第一压控振荡器,并产生用于在其中一个通道上接收信号的本地振荡信号;以及第一电流控制装置,用于控制第一振荡晶体管的集电极电流。 发射电路具有包括第二振荡晶体管的第二压控振荡器,并产生另一通道频率的信号;以及第二电流控制装置,用于控制第二振荡晶体管的集电极电流。 对应于压控振荡器的电流控制装置产生具有较高的一个频率的信号,该信号增加了相应的振荡晶体管的集电极电流。
    • 10. 发明授权
    • Radio communication apparatus having common oscillator applied for PLL,
conversion and scramble/descramble circuits
    • 具有应用于PLL,转换和加扰/解扰电路的公共振荡器的无线电通信装置
    • US5757921A
    • 1998-05-26
    • US617078
    • 1996-03-18
    • Taiwa OkanobuNobuo HareyamaHiroshi Yokoyama
    • Taiwa OkanobuNobuo HareyamaHiroshi Yokoyama
    • H03H11/04H03D7/16H03J5/02H04M1/00H04M1/725H04Q7/38H04B1/40
    • H04M1/72502H03D7/166H03J5/0272H04B1/40
    • A superheterodyne receiving circuit and a superheterodyne transmitting circuit are provided. A PLL forms a local oscillation signal in the receiving circuit, and a PLL forms a carrier signal in the signal transmitting circuit. A circuit converts digital data into signals suitable for transmission, and an oscillating circuit provides an oscillation signal. A frequency-dividing circuit forms a frequency-division signal of a reference frequency which is supplied to the PLLs by frequency-dividing the oscillation signal circuit, and a frequency-dividing circuit generates a clock signal required in the conversion circuit by frequency-dividing the oscillation signal. A frequency-dividing circuit forms a signal for descrambling the received voice signals which have been scrambled by frequency-dividing the oscillation signal, and a frequency-dividing circuit forms a signal for scrambling the voice signals to be transmitted by frequency-dividing the oscillation signal. In accordance with the invention, the essential circuitry of a cordless telephone set can be formed into a one-chip IC.
    • 提供超外差接收电路和超外差发射电路。 PLL在接收电路中形成本地振荡信号,PLL在信号发送电路中形成载波信号。 电路将数字数据转换成适合于传输的信号,并且振荡电路提供振荡信号。 分频电路通过对振荡信号电路进行分频而形成提供给PLL的基准频率的分频信号,分频电路通过对分频电路进行分频来生成转换电路所需的时钟信号 振荡信号。 分频电路形成用于对已经通过对振荡信号进行分频而被加扰的接收到的语音信号进行解扰的信号,并且分频电路通过对振荡信号进行分频而形成用于扰频要发送的语音信号的信号 。 根据本发明,无绳电话机的基本电路可以形成为单芯片IC。