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1. 发明专利

JP2002026652A OSCILLATOR 失效
公开(公告)号：JP2002026652A
公开(公告)日：2002-01-25
申请号：JP2000215827
申请日：2000-07-11
申请人： ALPS ELECTRIC CO LTD
发明人： YOSHISATO AKIYUKI , UEDA KAZUHIKO , KUKITA KEIMEI
IPC分类号： H03B5/12 , H03B5/18
摘要： PROBLEM TO BE SOLVED: To provide an oscillator that can obtain oscillated signals with nearly a constant level over the entire band of oscillated frequencies. SOLUTION: The oscillator is provided with an oscillation circuit section 10 that has an oscillation transistor (TR) 11 and a resonance circuit 12 where a collector of the oscillation TR 11 is connected to ground via a 1st capacitor 13 and with a common base amplifier circuit section 20 that has an amplification TR 21 whose emitter is directly connected to the collector of the oscillation TR 11 where a base of the amplification TR 21 is connected to ground via a 2nd capacitor 28. The resonance circuit 12 is connected between the base of the oscillation TR 11 and ground, the oscillated signal outputted from the collector of the oscillation TR 11 is given to the emitter of the amplifier TR 21, a 1st capacitor 13 bypasses part of the oscillated signal to ground and a 2nd capacitor 8 applies negative feedback to the amplification TR 21.

2. 发明专利

JPH04215467A INTEGRATED CIRCUIT 失效
公开(公告)号：JPH04215467A
公开(公告)日：1992-08-06
申请号：JP40239890
申请日：1990-12-14
申请人： ALPS ELECTRIC CO LTD
发明人： IGARASHI SADAO , AOKI KAZUHARU , KUKITA KEIMEI
IPC分类号： H01L21/822 , H01L27/04 , H04M1/00
摘要： PURPOSE:To provide an integrated circuit with a smaller number of parts, which includes a carrier oscillator capable of stable operation even in the event of transistor characteristics in a power amplifier. CONSTITUTION:A power amplifier 10 and a carrier oscillator 3 are formed on the same semiconductor substrate 2. The power amplifier has a ground terminal 11 connected to a point outside the substrate.

3. 发明专利

JP2002026653A OSCILLATOR 失效
公开(公告)号：JP2002026653A
公开(公告)日：2002-01-25
申请号：JP2000215828
申请日：2000-07-11
申请人： ALPS ELECTRIC CO LTD
发明人： UEDA KAZUHIKO , KUKITA KEIMEI
IPC分类号： H03B5/12 , H03B5/18
摘要： PROBLEM TO BE SOLVED: To provide an oscillator that can obtain oscillated signals with nearly a constant level over the entire band of oscillated frequencies. SOLUTION: The oscillator is provided with an oscillation circuit section 10 that has an oscillation transistor (TR) 11 and whose oscillated frequency is variable and with a common base amplifier circuit section 20 that has an amplification TR 21 whose emitter is directly connected to the collector of the oscillation TR 11 and amplifies the oscillated signal outputted from the oscillation circuit section 10. The collector of the oscillation TR 11 is directly connected to the emitter of the amplification TR 21, a common bias current is supplied to the oscillation TR 11 and the amplification TR 21, a connecting point between the collector of the oscillation TR 11 and the emitter of the amplification TR 21 is connected to ground via a series resonance circuit 13 consisting of an inductive element 13a and a capacitor 13b so as to lower the resonance frequency of the series resonance circuit more than the minimum frequency of a changing range of the oscillated frequency.

4. 发明专利

JPH0690179A TRANSMISSION CIRCUIT 失效
公开(公告)号：JPH0690179A
公开(公告)日：1994-03-29
申请号：JP4387491
申请日：1991-03-08
申请人： ALPS ELECTRIC CO LTD
发明人： AOKI KAZUHARU , KUKITA KEIMEI
IPC分类号： H04B1/04 , H04B1/38
摘要： PURPOSE:To provide the transmision circuit enabling low-output operations by means of an integrated circuit and to improve cross modulation distoration at the time of low-output operations. CONSTITUTION:At the time of low-output operations, a poitive voltage is impressed to a power save switch terminal SW1, OV is impressed to a power-off switch terminal SW2, only an NPN transistor Q7 is turned in a conducted state, and the voltage of a junction A is lower than the voltage of a normal transmitting state. In such a state, a radio of the resistance values of resistors R1 to R2 and the resistance value of a resistor R1 are selected so that the current of the respective emitters of NPN transistors Q3 and Q4 can be almost 1mA. Thus, a high frequency signal is sequentially amplified by a front stage amplifier 1 and a rear stage amplifier 2 while an infinitesimal bias current flows through a final stage amplifier 2, and radiated from an antenna through a balanced tuning circuit 3.

5. 发明专利

JPH0548472A TRANSMISSION CIRCUIT 失效
公开(公告)号：JPH0548472A
公开(公告)日：1993-02-26
申请号：JP3325491
申请日：1991-02-27
申请人： ALPS ELECTRIC CO LTD
发明人： AOKI KAZUHARU , KUKITA KEIMEI
IPC分类号： H04B1/04
摘要： PURPOSE:To attain stable operation even when an operating point of a power amplifier is revised by connecting a connecting point of 1st and 2nd amplifiers in cascade connection to a post-stage of a carrier oscillator to the power amplifier via a capacitor with a small capacitance. CONSTITUTION:A phase locked loop circuit 4 generates a control voltage corresponding to a difference between a frequency of an output signal of an amplifier 3 and a frequency of a selected channel and feeds back it to a carrier oscillator 1. Thus, the carrier frequency is controlled to be a frequency corresponding to the selected channel. In this case, the connecting point between the amplifiers 2, 3 is connected to an input terminal of a power amplifier 6 via a capacitor 5 with a small capacitance. Thus, even when the operating current of the power amplifier 6 is changed, the effect is not exerted on the amplifiers 2, 3 and the carrier oscillator 1. Furthermore, since the power amplifier 6 has a higher input impedance than the impedance interposed to the connecting point of the amplifiers 2, 3, an output signal of the amplifier 2 is delivered at a sufficient level even when the capacitance of the capacitor 5 is small.

6. 发明专利

JPH04302512A MULTI-STAGE CONNECTION AMPLIFIER 失效
公开(公告)号：JPH04302512A
公开(公告)日：1992-10-26
申请号：JP9156891
申请日：1991-03-29
申请人： ALPS ELECTRIC CO LTD
发明人： IGARASHI SADAO , AOKI KAZUHARU , KUKITA KEIMEI
IPC分类号： H03F3/191 , H03F3/45
摘要： PURPOSE:To minimize an unbalanced component and to amplify a signal with a high gain by joining the output currents of respective output terminals temporarily by a precedent-stage differential amplifier and shunting the joined current to the input terminals of a following-stage differential amplifier. CONSTITUTION:A composite tuning circuit 3 which forms DC short circuits between the output terminals of the precedent-stage differential amplifier 1 and the input terminals of the following-stage differential amplifier and also limits the bands of unbalanced AC signals generated at the output terminals of the precedent-stage differential amplifier 1 and sends the currents to the input terminals of the following-stage differential amplifier 2 is interposed. In this case, the output signals obtained from the output terminals of the precedent-stage differential amplifier 1 are inputted to the composite tuning circuit 3 and band-limited, and only the balanced components of the output signals are extracted and inputted to the input terminals of the following- stage differential amplifier 2. Then the following-stage differential amplifier 2 performs the differential amplification of the balanced signals from the composite tuning circuit 3 and the obtained output signal is band-limited by the tuning circuit consisting of a coil 41 and a capacitor 42 and outputted through a capacitor 44.

7. 发明专利

JPH04302462A MANUFACTURE OF INTEGRATED CIRCUIT FOR TRANSMISSION AND ONE FOR RECEPTION 失效
公开(公告)号：JPH04302462A
公开(公告)日：1992-10-26
申请号：JP9156991
申请日：1991-03-29
申请人： ALPS ELECTRIC CO LTD
发明人： IGARASHI SADAO , AOKI KAZUHARU , SHINOMIYA YOSHITAKA , KUKITA KEIMEI , YOSHISATO AKIYUKI
IPC分类号： H01L21/82 , H01L21/822 , H01L27/04
摘要： PURPOSE:To reduce man-hours for overall mask pattern designing, by forming on a semiconductor substrate a group of devices required for circuits included in only one of the transmission and reception circuits and at the same time, included in both transmitting and receiving circuits in common. CONSTITUTION:A group of devices 1-5, required for forming both integrated circuit 100T for transmission and one 100R, for reception are formed on a semiconductor substrate 100. With a mask pattern corresponding to integrated circuit 100T for transmission, the substrate 100 is processed in wiring formation so as to produce the integrated circuit 100T for transmission. Then, the semiconductor substrate 100 is processed in wiring formation with a mask pattern corresponding to the integrated circuit 100R for reception so as to produce the integrated circuit 100R for reception. In this way, the man-hours can be reduced in overall mask pattern designing for the integrated circuits for transmission and reception.

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