WO2005125004A1 - 電圧制御発振器 - Google Patents
電圧制御発振器 Download PDFInfo
- Publication number
- WO2005125004A1 WO2005125004A1 PCT/JP2004/008957 JP2004008957W WO2005125004A1 WO 2005125004 A1 WO2005125004 A1 WO 2005125004A1 JP 2004008957 W JP2004008957 W JP 2004008957W WO 2005125004 A1 WO2005125004 A1 WO 2005125004A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit
- capacitance
- controlled oscillator
- negative
- variable capacitance
- Prior art date
Links
- 230000010355 oscillation Effects 0.000 claims abstract description 67
- 230000005669 field effect Effects 0.000 claims description 41
- 238000010586 diagram Methods 0.000 description 22
- 230000000694 effects Effects 0.000 description 10
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 206010037833 rales Diseases 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/40—Impedance converters
- H03H11/44—Negative impedance converters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1203—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier being a single transistor
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1228—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more field effect transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1231—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more bipolar transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
- H03B5/124—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance
- H03B5/1243—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance the means comprising voltage variable capacitance diodes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
- H03B5/1293—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator having means for achieving a desired tuning characteristic, e.g. linearising the frequency characteristic across the tuning voltage range
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/28—Impedance matching networks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/46—One-port networks
- H03H11/48—One-port networks simulating reactances
- H03H11/481—Simulating capacitances
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
- H03B2200/003—Circuit elements of oscillators
- H03B2200/004—Circuit elements of oscillators including a variable capacitance, e.g. a varicap, a varactor or a variable capacitance of a diode or transistor
- H03B2200/0042—Circuit elements of oscillators including a variable capacitance, e.g. a varicap, a varactor or a variable capacitance of a diode or transistor the capacitance diode being in the feedback path
Definitions
- the present invention relates to a voltage controlled oscillator having an oscillating frequency band broadened.
- Conventional voltage-controlled oscillators include an active element for oscillation composed of a field-effect transistor, a first reactance circuit connected to the source terminal of the field-effect transistor, and a gate connected to the gate terminal of the field-effect transistor.
- the second reactance circuit, the third reactance circuit connected to the drain terminal of the field-effect transistor, and the oscillation power amplified by the field-effect transistor connected to the third reactance circuit are connected to the third reactance circuit.
- the operation is as follows. Noise in the circuit of the voltage controlled oscillator is amplified by the active element for oscillation, and the first to third reactance circuits connected to each terminal of the active element for oscillation cause the amplified power to be amplified. A part is returned to the active element for oscillation, and the power is further amplified by the active element for oscillation to perform the oscillation operation, and the oscillation is output from the load resistor.
- the oscillation frequency is determined by the resonance frequency of the tuning circuit. When controlling the oscillation frequency, the control voltage applied to the variable capacitance element is changed, thereby changing the junction capacitance of the variable capacitance element and changing the resonance frequency of the tuning circuit. This As a result, the oscillation frequency changes.
- Relationship of the junction capacitance of the oscillation frequency and the variable capacitance element is (fma Z f m i n) 2 ⁇ C j- ma ⁇ ZC j- m i ".
- the lowest oscillation frequency, C j — max , and C jmin are the maximum variable capacitance value and the minimum variable capacitance value, respectively (for example, see Patent Document 1).
- the conventional voltage controlled oscillator is configured as described above, a wide oscillation frequency band is obtained by greatly changing the junction capacitance of the variable capacitance element, but the oscillation frequency band is There were problems such as being limited by the change ratio of the junction capacitance.
- the present invention has been made to solve the above-described problems, and has as its object to obtain a voltage-controlled oscillator that increases the change ratio of the capacitance of a variable capacitance element equivalently and widens the oscillation frequency band. . Disclosure of the invention
- a voltage-controlled oscillator has a negative capacitance circuit connected to a variable capacitance element, the frequency characteristic of impedance being opposite to that of a normal capacitance.
- FIG. 1 is a circuit diagram showing a voltage controlled oscillator according to Embodiment 1 of the present invention.
- FIG. 2 is a characteristic diagram showing changes in the combined capacitance of the variable capacitance element and the negative capacitance circuit of the voltage controlled oscillator according to the first embodiment of the present invention.
- FIG. 3 is a Smith chart showing the frequency characteristics of the negative capacitance circuit.
- FIG. 4 is a circuit diagram showing a voltage controlled oscillator according to Embodiment 2 of the present invention.
- FIG. 5 is a characteristic diagram showing changes in the combined capacitance of the variable capacitance element and the negative capacitance circuit of the voltage controlled oscillator according to the second embodiment of the present invention.
- FIG. 6 is a circuit diagram showing a voltage controlled oscillator according to Embodiment 3 of the present invention.
- FIG. 7 is a circuit diagram showing a voltage controlled oscillator according to Embodiment 4 of the present invention.
- FIG. 8 is a circuit diagram showing another voltage-controlled oscillator according to Embodiment 4 of the present invention.
- FIG. 9 is a circuit diagram showing a voltage controlled oscillator according to Embodiment 5 of the present invention.
- FIG. 10 is a circuit diagram showing a voltage controlled oscillator according to Embodiment 6 of the present invention.
- FIG. 11 is a circuit diagram showing a voltage controlled oscillator according to Embodiment 7 of the present invention.
- FIG. 12 is a circuit diagram showing a voltage controlled oscillator according to Embodiment 8 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a circuit diagram showing a voltage-controlled oscillator according to Embodiment 1 of the present invention.
- a field-effect transistor 1 functions as an active oscillation element for amplifying power in the circuit of the voltage-controlled oscillator. Things.
- the reactance circuit (first reactance circuit) 2 a is connected to the gate terminal (first terminal) of the field effect transistor 1
- the reactance circuit (second reactance circuit) 2 b is a field effect transistor 1 is connected to the source terminal (second terminal)
- the reactance circuit (third reactance circuit) 2 c is connected to the drain terminal (third terminal) of the field effect transistor 1.
- the load resistor 3 is connected in parallel with the reactance circuit 2c, and outputs the oscillation power amplified by the field effect transistor 1.
- the inductor 4 in the reactance circuit 2a is connected in series to the gate terminal of the field-effect transistor 1.
- the variable capacitance element 5 is composed of a diode or the like, is connected in series with the inductor 4, and has a capacitance that changes according to a control voltage.
- the negative capacitance circuit 6 has a frequency characteristic of an impedance opposite to that of a normal capacitance, and is connected in parallel to the variable capacitance element 5.
- the reactance circuit 2a to which these variable capacitance elements 5 are connected constitutes a tuning circuit for controlling the oscillation frequency.
- FIG. 2 is a characteristic diagram showing a change in the combined capacitance of the variable capacitance element of the voltage controlled oscillator and the negative capacitance circuit according to the first embodiment of the present invention.
- Fig. 3 is a Smith chart showing the frequency characteristics of the negative capacitance circuit.As shown in Fig. 3, the negative capacitance circuit 6 has the opposite frequency to the normal capacitance on the Smith chart. Orientation.
- the control voltage of the combined capacitance composed of the variable capacitance element 5 and the negative capacitance circuit 6 can be reduced.
- the oscillation frequency band can be widened.
- the active element for oscillation can be easily constituted by the field effect transistor 1.
- the reactance having the variable capacitance element 5 is used.
- the tuning circuit that controls the oscillation frequency is configured by the circuit 2a, but the variable capacitance element is the reactance circuit 2a, the reactance circuit 2b or the reactance circuit 2c, or the reactance circuit 2b , 2c.
- a reactance circuit having a variable capacitance element can function as a tuning circuit for controlling the oscillation frequency.
- FIG. 4 is a circuit diagram showing a voltage-controlled oscillator according to Embodiment 2 of the present invention.
- a negative capacitance circuit 6 is connected in series to a variable capacitance element 5.
- Other configurations are the same as in Fig. 1.
- the negative capacitance circuit 6 is connected to the variable capacitance element 5 in parallel, but in the second embodiment, the negative capacitance circuit 6 is connected in series to the variable capacitance element 5. is there.
- FIG. 5 is a characteristic diagram showing a change in the combined capacitance of the variable capacitance element of the voltage controlled oscillator and the negative capacitance circuit according to the second embodiment of the present invention.
- the negative capacitance is applied to the variable capacitance element 5. Since the negative capacitance circuit 6 is connected in series, as shown in FIG. 5, the maximum value of the junction capacitance Cj of the variable capacitance element 5 depends on the capacitance I ⁇ C tediousI of the negative capacitance circuit 6.
- the change ratio of the combined capacitance C j tra , e is (2), it can be seen that it becomes larger.
- C j rale '' ⁇ ⁇ C selfish-cj— min )> [C n -c ⁇ C n > C j max b);
- FIG. 6 is a circuit diagram showing a voltage controlled oscillator according to Embodiment 3 of the present invention.
- the inductor 4 in the reactance circuit 2b is
- the variable capacitance element 5b is configured by a diode diode or the like, is connected in series with the inductor 4b, and changes the capacitance according to a control voltage.
- the negative capacitance circuit 6b has a frequency characteristic of an impedance opposite to that of a normal capacitance, and is connected in series to the variable capacitance element 5b.
- the inductor 4c is connected in series to the drain terminal of the field effect transistor 1 as a tuning circuit for controlling the oscillation frequency in the reactor nos circuit 2c.
- the variable capacitance element 5c is configured in a non-reactor diode or the like, is connected in series with the inductor 4c, and changes the capacitance in accordance with the control voltage.
- the negative capacitance circuit 6c has a characteristic in which the frequency characteristic of the impedance is opposite to that of a normal capacitance, and is connected in series to the variable capacitance element 5c. Other configurations are the same as in Fig. 4.
- the operation will be described.
- the configuration in which the negative capacitance circuit 6 is connected to the variable capacitance element 5 in the reactance circuit 2a has been described.
- the reactance circuits 2b and 2 In c the negative capacitance circuit is connected to the variable capacitance element.
- variable capacitance elements 5b and 5c are also provided in the reactance circuits 2b and 2c to form a tuning circuit, so that the frequency band satisfying the oscillation condition is widened, and the effect of widening the band is further increased.
- the negative capacitance circuits 6b and 6c are connected to the variable capacitance elements 5b and 5c, the effect of widening the band is further enhanced.
- the frequency band satisfying the oscillation condition can be expanded.
- the oscillation frequency band can be further widened, and the negative capacitance circuits 6 b and 6 c are connected to the variable capacitance elements 5 b and 5 c, so that the variable capacitance elements 5 b and 5 c according to the control voltage can be obtained.
- the oscillation frequency band can be further widened by increasing the change ratio of the combined capacitance composed of c and the negative capacitance circuits 6b and 6c.
- a series circuit including an inductor, a variable capacitance element, and a negative capacitance circuit is provided in each of the reactance circuits 2 a to 2 c, but the variable capacitance element and the negative capacitance circuit are
- a similar effect may be obtained by using a parallel circuit.
- the reactance circuits 2 a to 2 c are composed of a combination of a series circuit including an inductor, a variable capacitance element, and a negative capacitance circuit and a parallel circuit. May have the same effect.
- the reactance circuits 2a to 2c are not configured identically, for example, a variable capacitance element is provided in at least one of the reactance circuits 2a to 2c, and A negative capacitance circuit may be connected to at least one of the one or more variable capacitance elements, and a similar effect is obtained.
- the respective configurations of the reactance circuits 2 a to 2 c may be different from each other, and may be a combination of a series circuit including an inductor, a variable capacitance element, and a negative capacitance circuit and a parallel circuit, and the same effect is obtained. .
- FIG. 7 is a circuit diagram showing a voltage controlled oscillator according to Embodiment 4 of the present invention.
- a field effect transistor (first field effect transistor) 7 in a negative capacitance circuit 6 has a variable gate terminal. It is connected in parallel with the capacitive element 5 and the source terminal is grounded.
- the field-effect transistor (second field-effect transistor) 8 has a drain terminal connected to the gate terminal of the field-effect transistor 7, a source terminal grounded, and a gate terminal connected to the drain of the field-effect transistor 7.
- Inductor 9 has one end connected to the drain terminal of field effect transistor 7 and the other end grounded. Other configurations are the same as in Fig. 1.
- the negative capacitance circuit in the first embodiment is configured by two field-effect transistors 7 and 8 and one inductor 9.
- the negative capacitance circuit 6 shown in FIG. It has the characteristic of negative impedance because a negative current flows. On the Smith chart, as shown in Fig. 3, characteristics opposite to normal capacitance with respect to frequency are obtained.
- the negative capacitance circuit 6 connected in parallel to the variable capacitance element according to the first embodiment is configured by two field-effect transistors 7 and 8 and one inductor 9. However, this may be applied to the second embodiment.
- FIG. 8 is a circuit diagram showing another voltage controlled oscillator according to the fourth embodiment of the present invention.
- the field effect transistor 7 in the negative capacitance circuit 6 has a gate terminal connected to the variable capacitance element 5. They are connected in series.
- Other configurations are the same as in FIG.
- the negative capacitance circuit 6 can be easily constituted by the two field-effect transistors 7 and 8 and the one inductor 9, and the variable capacitance
- the change ratio according to the control voltage of the combined capacitance composed of the variable capacitance element 5 and the negative capacitance circuit 6 is increased, and the oscillation frequency band is widened. It can be banded.
- FIG. 9 is a circuit diagram showing a voltage controlled oscillator according to a fifth embodiment of the present invention.
- a negative capacitance circuit (first negative capacitance circuit) 6a has an impedance with respect to a normal capacitance. Frequency characteristics have opposite characteristics And connected in series to a parallel circuit composed of the variable capacitance element 5 and the negative capacitance circuit 6.
- Other configurations are the same as in Fig. 1.
- the negative capacitance circuit 6 is connected in parallel to the variable capacitance element 5, but in the fifth embodiment, the negative capacitance circuit 6a is further connected in series to the parallel circuit. Things.
- the negative capacitance circuit 6a is connected in series to the parallel circuit, the maximum value of the combined capacitance increases, and the change ratio of the combined capacitance increases. As a result, a wider oscillation frequency band can be obtained.
- the negative capacitance circuit 6a is connected in series to the parallel circuit including the variable capacitance element 5 and the negative capacitance circuit 6.
- the change ratio according to the control voltage of the combined capacitance including the variable capacitance element 5, the negative capacitance circuit 6, and the negative capacitance circuit 6a is further increased, and the oscillation frequency band is further broadened. be able to.
- FIG. 10 is a circuit diagram showing a voltage controlled oscillator according to Embodiment 6 of the present invention.
- a negative capacitance circuit 6a is connected in parallel with a series circuit comprising a variable capacitance element 5 and a negative capacitance circuit 6. Connected to.
- Other configurations are the same as in Fig. 4.
- the negative capacitance circuit 6 is connected in series to the variable capacitance element 5, but in the sixth embodiment, the negative capacitance circuit 6a is further connected in parallel to the series circuit. Things.
- Et al is, therefore connecting the negative capacitance circuit 6 a in parallel to the series circuit, the synthesized capacitance capacitance of the negative capacitance circuit 6 a I _ C n - a I minute small no longer, the combined capacitance The change ratio increases. As a result, a wider oscillation frequency band can be obtained.
- the negative capacitance circuit 6a is connected in parallel to the series circuit including the variable capacitance element 5 and the negative capacitance circuit 6.
- the change ratio according to the control voltage of the combined capacitance including the variable capacitance element 5, the negative capacitance circuit 6, and the negative capacitance circuit 6a is further increased, and the oscillation frequency band is further broadened. be able to.
- FIG. 11 is a circuit diagram showing a voltage controlled oscillator according to a seventh embodiment of the present invention.
- a variable capacitance element (first variable capacitance element) 5 d includes a gate terminal of field-effect transistor 1 and It is connected between the source terminals, and the capacitance changes according to the control voltage.
- Other configurations are the same as in FIG.
- the seventh embodiment further includes a variable capacitance element 5d connected between the gate terminal and the source terminal of the field effect transistor 1. Things.
- the gate-source capacitance C ⁇ s increases according to the control voltage, and the effect of widening the bandwidth is reduced. It becomes even larger.
- FIG. 12 is a circuit diagram showing a voltage controlled oscillator according to an eighth embodiment of the present invention.
- a bipolar transistor 10 functions as an active oscillation element for amplifying power in the circuit of the voltage controlled oscillator. That is what you do.
- the variable capacitance element 5d is connected between the emitter terminal and the base terminal of the bipolar transistor 10, and has a capacitance that changes according to the control voltage.
- Other configurations are the same as in Fig. 11. Next, the operation will be described.
- Embodiments 1 to 7 the case where the field-effect transistor 1 is used as the active element for oscillation has been described.
- a bipolar transistor 10 is used as an active element for the semiconductor device.
- the power in the circuit of the voltage controlled oscillator is amplified by the bipolar transistor 10 and the first to third reactance circuits connected to the respective terminals of the bipolar transistor 10. 2a to 2c, a part of the amplified power is returned to the bipolar transistor 10 and the power is further amplified by the bipolar transistor 10 to perform an oscillating operation.
- the oscillation frequency is determined by the resonance frequency of the tuning circuit.
- the control voltage applied to the variable capacitance element 5 is changed to change the junction capacitance of the variable capacitance element and change the resonance frequency of the tuning circuit. As a result, the oscillation frequency changes.
- Embodiment 8 since the negative capacitance circuit is connected in series to the variable capacitance element, the maximum value of the junction capacitance of the variable capacitance element becomes larger due to the capacitance of the negative capacitance circuit, and the change in the combined capacitance The ratio increases. As a result, a wide oscillation frequency band can be obtained.
- the capacitance C gs between the gate and the source of the field effect transistor 1 is changed according to the control voltage.
- the corresponding bipolar transistor 10 has a large emitter-base capacitance C j, and the effect of widening the bandwidth is even greater.
- the active element for oscillation can be easily constituted by the bipolar transistor 10.
- the voltage controlled oscillator according to the present invention is applicable to, for example, radio wave observation and measuring instruments.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/008957 WO2005125004A1 (ja) | 2004-06-18 | 2004-06-18 | 電圧制御発振器 |
JP2006514658A JP4611290B2 (ja) | 2004-06-18 | 2005-03-07 | 電圧制御発振器 |
PCT/JP2005/003898 WO2005124992A1 (ja) | 2004-06-18 | 2005-03-07 | 電圧制御発振器 |
CNB2005800183514A CN100553113C (zh) | 2004-06-18 | 2005-03-07 | 压控振荡器 |
EP05720170.9A EP1760876B1 (en) | 2004-06-18 | 2005-03-07 | Voltage controlled oscillator |
US11/629,531 US7675376B2 (en) | 2004-06-18 | 2005-03-07 | Voltage-controlled oscillator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/008957 WO2005125004A1 (ja) | 2004-06-18 | 2004-06-18 | 電圧制御発振器 |
Publications (1)
Publication Number | Publication Date |
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WO2005125004A1 true WO2005125004A1 (ja) | 2005-12-29 |
Family
ID=35510055
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/008957 WO2005125004A1 (ja) | 2004-06-18 | 2004-06-18 | 電圧制御発振器 |
PCT/JP2005/003898 WO2005124992A1 (ja) | 2004-06-18 | 2005-03-07 | 電圧制御発振器 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/003898 WO2005124992A1 (ja) | 2004-06-18 | 2005-03-07 | 電圧制御発振器 |
Country Status (5)
Country | Link |
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US (1) | US7675376B2 (ja) |
EP (1) | EP1760876B1 (ja) |
JP (1) | JP4611290B2 (ja) |
CN (1) | CN100553113C (ja) |
WO (2) | WO2005125004A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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ES2321786B1 (es) * | 2006-11-15 | 2010-04-07 | Universitat De Valencia, Estudi Genera | Circuito electronico para obtener una impedancia capacitiva variable. |
FR2926689A1 (fr) * | 2008-01-18 | 2009-07-24 | Commissariat Energie Atomique | Dispositif electrique a resonateur a large plage de variation en frequences |
CN101931426B (zh) | 2010-04-21 | 2013-05-15 | 北京昆腾微电子有限公司 | 通讯和广播接收机前置可调谐滤波器的电路及其调谐方法 |
US9240755B2 (en) * | 2013-04-17 | 2016-01-19 | Nihon Dempa Kogyo Co., Ltd. | Oscillator circuit |
US9985592B2 (en) * | 2015-05-13 | 2018-05-29 | Skyworks Solutions, Inc. | High gain RF power amplifier with negative capacitor |
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- 2004-06-18 WO PCT/JP2004/008957 patent/WO2005125004A1/ja active Application Filing
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- 2005-03-07 CN CNB2005800183514A patent/CN100553113C/zh not_active Expired - Fee Related
- 2005-03-07 WO PCT/JP2005/003898 patent/WO2005124992A1/ja not_active Application Discontinuation
- 2005-03-07 JP JP2006514658A patent/JP4611290B2/ja active Active
- 2005-03-07 EP EP05720170.9A patent/EP1760876B1/en active Active
- 2005-03-07 US US11/629,531 patent/US7675376B2/en active Active
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Also Published As
Publication number | Publication date |
---|---|
CN1965471A (zh) | 2007-05-16 |
EP1760876A1 (en) | 2007-03-07 |
US7675376B2 (en) | 2010-03-09 |
EP1760876B1 (en) | 2018-05-30 |
EP1760876A4 (en) | 2008-07-23 |
US20070247244A1 (en) | 2007-10-25 |
JPWO2005124992A1 (ja) | 2008-04-17 |
CN100553113C (zh) | 2009-10-21 |
JP4611290B2 (ja) | 2011-01-12 |
WO2005124992A1 (ja) | 2005-12-29 |
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