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    • 2. 发明申请
    • OSCILLATOR
    • 振荡器
    • WO1996004709A1
    • 1996-02-15
    • PCT/JP1995001525
    • 1995-08-01
    • IKEDA, TakeshiOHE, TadatakaNAKANISHI, Tsutomu
    • H03B05/20
    • H03B5/20H03B2200/004H03B2200/0078H03B2201/02
    • An oscillator which is easily formed into an integrated circuit and stably operated and the oscillation frequency of which can be adjusted within a wide range. The oscillator has two phase shifting circuits (10C and 30C) and a feedback resistor (70). The phase shifting circuits (10C and 30C) each have an operational amplifier which receives signals through a resistor at an inverting input terminal, a series circuit comprising a capacitor across both ends of which the voltage of the input signal is applied and a variable resistor, and a resistor for feeding back the output of the operational amplifier to the inverting input terminals. The output of the phase shifting circuit (10C) is connected to the input of the phase shifting circuit (30C). The feedback resistor (70) feeds back the signal outputted from the phase shifting circuit (30C) to the input side of the phase shifting circuit (10C).
    • 一种易于形成集成电路并稳定工作并且其振荡频率可在宽范围内调节的振荡器。 振荡器具有两个移相电路(10C和30C)和反馈电阻(70)。 相移电路(10C和30C)各自具有运算放大器,其通过反相输入端子处的电阻器接收信号,串联电路包括施加输入信号的电压的两端的电容器和可变电阻器, 以及用于将运算放大器的输出反馈到反相输入端子的电阻器。 移相电路(10C)的输出端连接到移相电路(30C)的输入端。 反馈电阻(70)将从移相电路(30C)输出的信号反馈到移相电路(10C)的输入侧。
    • 7. 发明申请
    • TUNING CIRCUIT
    • 调谐电路
    • WO1996021970A1
    • 1996-07-18
    • PCT/JP1996000026
    • 1996-01-11
    • IKEDA, TakeshiOHE, TadatakaNAKANISHI, Tsutomu
    • H03H11/12
    • H03H11/1217H03H11/1291H03H11/20H03H11/481H03H11/483H03H11/485H03H2210/012H03H2210/015H03H2210/026H03H2210/028
    • A tuning circuit which has a wide tuning bandwidth. The tuning bandwidth of the tuning frequency can be easily changed. The tuning circuit (1) is composed of two cascade-connected tuning amplifier sections (2 and 3). Each of the sections (2 and 3) is provided with cascade-connected phase-shifting circuits (10C and 30C), a voltage dividing circuit (60), and an adding circuit composed of a feedback resistor (70) and an input resistor (74). Prescribed tuning operation is performed by shifting the phase of a prescribed frequency by 360 DEG by means of the phase shifting circuits (10C and 30C) and setting the open loop gain of a feedback loop at less than (1) when the output of the voltage dividing circuit (60) is feedback. The resistance ratio between the feedback resistor (70) and input resistor (74) of each tuning amplifier section is adjusted in order that the maximum damping of each tuning amplifier section becomes smaller and the tuning bandwidth of each amplifier section becomes wider. Therefore, since the tuning amplifier sections are cascade-connected, the maximum damping is increased and the tuning bandwidth is widened as a whole.
    • 具有宽调谐带宽的调谐电路。 调谐频率的调谐带宽可以很容易地改变。 调谐电路(1)由两个级联连接的调谐放大器部分(2和3)组成。 每个部分(2和3)设有级联的移相电路(10C和30C),分压电路(60)和由反馈电阻(70)和输入电阻( 74)。 通过移相电路(10C和30C)将规定频率的相位移动360°并将反馈环路的开环增益设定为低于(1)的定时调谐操作,当电压的输出 分频电路(60)是反馈。 调整每个调谐放大器部分的反馈电阻器(70)和输入电阻器(74)之间的电阻比,使得每个调谐放大器部分的最大阻尼变小,并且每个放大器部分的调谐带宽变宽。 因此,由于调谐放大器部分级联连接,所以最大阻尼增加,调谐带宽整体变宽。
    • 8. 发明申请
    • TUNING CIRCUIT
    • 调谐电路
    • WO1996021969A1
    • 1996-07-18
    • PCT/JP1996000027
    • 1996-01-11
    • IKEDA, TakeshiOHE, TadatakaNAKANISHI, Tsutomu
    • H03H11/04
    • H03H11/20H03H11/04H03H11/1291H03H11/481H03H11/485
    • A tuning circuit which has a wide tuning bandwidth. The tuning bandwidth or the tuning frequency can be easily changed. The tuning circuit (1) is imposed of two cascade-connected tuning amplifier sections (2 and 3). Each of the sections (2 and 3) is provided with cascade-connected phase-shifting circuits (10C and 30C), a noninverting circuit (50), a voltage dividing circuit (160), and an aadding circuit composed of a feedback resistor (70) and an input resistor (74). Prescribed tuning operation is performed by shifting the prescribed frequency 360 DEG by means of the phase shifting circuits (10C and 30C) and setting the open loop gain of a feedback loop at less than 1 when the output of the voltage dividing circuit (160) is feedback. The resistance ratio between the feedback resistor (70) and the input resistor (74) of each section (2, 3) is adjusted so that the maximum damping of each section (2, 3) may become smaller and the tuning bandwidth of each section (2, 3) becomes wider. Therefore, since the two tuning amplifier sections are cascade-connected, the maximum damping is increased and thetuning bandwidth is widened as a whole.
    • 具有宽调谐带宽的调谐电路。 调谐带宽或调谐频率可以轻松改变。 调谐电路(1)由两个级联连接的调谐放大器部分(2和3)施加。 每个部分(2和3)设有级联的移相电路(10C和30C),同相电路(50),分压电路(160)和由反馈电阻( 70)和输入电阻(74)。 通过移相电路(10C和30C)将规定频率360°移动并且当分压电路(160)的输出为(1))时将反馈回路的开环增益设定为小于1,执行规定的调谐操作 反馈。 调整每个部分(2,3)的反馈电阻(70)和输入电阻(74)之间的电阻比,使得每个部分(2,3)的最大阻尼可能变小,并且每个部分的调谐带宽 (2,3)变宽。 因此,由于两个调谐放大器部分级联连接,所以最大阻尼增加,并且整体带宽变宽。
    • 9. 发明申请
    • TUNING AMPLIFIER
    • 调谐放大器
    • WO1996004712A1
    • 1996-02-15
    • PCT/JP1995001526
    • 1995-08-01
    • IKEDA, TakeshiOHE, TadatakaNAKANISHI, Tsutomu
    • H03F03/191
    • H03B5/20
    • A tuning amplifier which can be easily formed in an integrated circuit and whose tuning frequency and maximum damping quantity can be independently adjusted. The amplifier comprises two phase shifters (10C and 30C), each including an operational amplifier with its inverting input terminal connected with a resistor, a series circuit of a capacitor and a variable resistor across which an input signal voltage is applied, and a resistor for feeding back the output of the operational amplifier to the inverting input terminal; and an addition circuit including a feedback resistor (70) and an input resistor (90) to combine the output signal from the phase shift circuit (30C) of the post stage with the input signal to the input terminal (90) in a predetermined proportion.
    • 可以容易地在集成电路中形成并且其调谐频率和最大阻尼量可以独立调节的调谐放大器。 放大器包括两个移相器(10C和30C),每个移相器包括一个运算放大器,其反相输入端与一个电阻器连接,一个电容器的串联电路和一个可变电阻器,一个输入信号电压施加在该可变电阻器上,一个电阻器 将运算放大器的输出反馈到反相输入端子; 以及包括反馈电阻器(70)和输入电阻器(90)的加法电路,用于将来自后级的相移电路(30C)的输出信号与输入信号以预定比例组合到输入端子(90) 。