CN209016994U - A kind of voltage-controlled oscillator circuit - Google Patents

A kind of voltage-controlled oscillator circuit Download PDF

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Publication number
CN209016994U
CN209016994U CN201821944429.6U CN201821944429U CN209016994U CN 209016994 U CN209016994 U CN 209016994U CN 201821944429 U CN201821944429 U CN 201821944429U CN 209016994 U CN209016994 U CN 209016994U
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CN
China
Prior art keywords
triode
connect
amplifier
power splitter
output end
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Expired - Fee Related
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CN201821944429.6U
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Chinese (zh)
Inventor
林凯
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Chengdu Lixin Tiandi Electronic Technology Co Ltd
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Chengdu Lixin Tiandi Electronic Technology Co Ltd
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Priority to CN201821944429.6U priority Critical patent/CN209016994U/en
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Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to field of oscillators, and in particular to a kind of voltage-controlled oscillator circuit.Including sequentially connected first amplifier, LC oscillating circuit, the first fixed attenuator, low-pass filter, the first power splitter;Two output ends of first power splitter pass through the second amplifier respectively, third amplifier is connect with two input terminals of the second power splitter, the output end of second power splitter is connect with the input terminal of the second fixed attenuator, and the output end of second fixed attenuator is the output end of VHF voltage-controlled oscillator circuit.

Description

A kind of voltage-controlled oscillator circuit
Technical field
The utility model relates to field of oscillators, especially a kind of voltage-controlled oscillator circuit.
Background technique
Traditional voltage controlled oscillator is mainly made of Voltage-Controlled oscillation circuit and power circuit, and output frequency has with input voltage Certain function corresponding relationship, the selection of Lai Shixian output frequency.Voltage controlled oscillator is widely used in signal generator, electronics sound Manufacture modified tone, phase-locked loop, the frequency synthesizer in communication apparatus in pleasure, at the same its be also important component in radar system it One, the device principle of existing voltage controlled oscillator is excessively outmoded, results in that linearity of tuning degree is poor, and output power flatness is poor, work It is big to make power consumption, and poor reliability, performance is unstable, easily breaks down.
Utility model content
The goal of the invention of the utility model is: in view of the problems of the existing technology, providing a kind of based on LC concussion electricity The VHF wave band low-power consumption high linearity voltage controlled oscillator on road.
To achieve the goals above, the technical solution adopted in the utility model are as follows:
A kind of VHF voltage-controlled oscillator circuit, including sequentially connected first amplifier, LC oscillating circuit, the first fixation decline Subtract device, low-pass filter, the first power splitter;Two output ends of first power splitter pass through the second amplifier, third respectively Amplifier is connect with two input terminals of the second power splitter, and the output end of second power splitter is defeated with the second fixed attenuator Enter end connection, the output end of second fixed attenuator is the output end of VHF voltage-controlled oscillator circuit.
The LC oscillating circuit includes the first variable capacitance of concatenation, the second variable capacitance, first variable capacitance, the The common end of two variable capacitances is connect with the output end of the first amplifier, while the first variable capacitance of the concatenation, second variable Capacitor and an inductance simultaneously connect;The both ends of the inductance are connect with the collector of the first triode, the second triode respectively;Described The collector of one triode also passes through the first fixed capacity and connect with the base stage of the second triode;The current collection of second triode Pole is connect by the second fixed capacity with the base stage of the first triode;The base stage of first triode and the base stage of the second triode are logical Cross first resistor, the second resistance connection of concatenation;Meanwhile first triode and the second triode emitter-base bandgap grading and a current source connect It connects.
Further, first amplifier is OP27GS.
Further, second amplifier, the second amplifier are PSA4-5043.
Further, first fixed attenuator, the second fixed attenuator are PAT1220C-2dB-T.
Further, first power splitter, the second power splitter are SBTC-2-10.
Further, first triode and the second triode are NPN transistor.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are: the utility model provides VHF wave band low-power consumption high linearity voltage controlled oscillator utilize LC resonance the regulation of electrical circuit output end frequency, structure is simple, using just Victory, and the phase noise of output signal is lower, circuit integrity can be high.
Detailed description of the invention
Fig. 1 is VHF voltage-controlled oscillator circuit block diagram provided by the utility model.
Fig. 2 is middle LC oscillating circuit circuit diagram.
Appended drawing reference: the first amplifier of 1-, 2-LC oscillating circuit, the first fixed attenuator of 3-, the low cylinder filter of 4-, 5- One power splitter, the second amplifier of 6-, 7- third amplifier, the second power splitter of 8-, the second fixed attenuator of 9-.
Specific embodiment
With reference to the accompanying drawing, the utility model is described in detail.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this Utility model is not used to limit the utility model.
Embodiment 1: as shown in Figure 1 and Figure 2, the present embodiment provides a kind of VHF voltage-controlled oscillator circuits, including are sequentially connected The first amplifier 1, LC oscillating circuit 2, the first fixed attenuator 3, low-pass filter 4, the first power splitter 5;First function Two input terminals for being divided to two output ends of device 5 to pass through the second amplifier 6, third amplifier 7 and the second power splitter 8 respectively connect It connects, the output end of second power splitter 8 is connect with the input terminal of the second fixed attenuator 9, second fixed attenuator 9 Output end is the output end of VHF voltage-controlled oscillator circuit.
The LC oscillating circuit includes the first variable capacitance C1, the second variable capacitance C2 of concatenation, and described first can power transformation Hold C1, the common end of the second variable capacitance C2 is connect with the output end of the first amplifier 1, while the first variable capacitance of the concatenation C1, the second variable capacitance C2 and an inductance L1 simultaneously connect;The both ends of the inductance L1 respectively with the first triode Q1, the second triode The collector of Q2 connects;The collector of the first triode Q1 also passes through the base of the first fixed capacity C3 and the second triode Q2 Pole connection;The collector of the second triode Q2 is connect by the second fixed capacity C4 with the base stage of the first triode Q1;The The base stage of one triode Q1 is connected with the base stage of the second triode Q2 by first resistor R1, the second resistance R2 concatenated;Meanwhile The emitter-base bandgap grading of first triode Q1 and the second triode Q2 are connect with a current source;The both ends of inductance L1 are difference output end.
In the present embodiment, the first amplifier 1 is OP27GS, and the second amplifier 6, the second amplifier 7 are PSA4-5043, the One fixed attenuator 3, the second fixed attenuator 9 are PAT1220C-2dB-T, and the first power splitter 5, the second power splitter 8 are SBTC- 2-10。
Embodiment 2: the present embodiment provides a kind of VHF voltage-controlled oscillator circuit, including sequentially connected first amplifier 1, LC oscillating circuit 2, the first fixed attenuator 3, low-pass filter 4, the first power splitter 5;Two outputs of first power splitter 5 End is connect by the second amplifier 6, third amplifier 7 with two input terminals of the second power splitter 8 respectively, second power splitter 8 output end is connect with the input terminal of the second fixed attenuator 9, and the output end of second fixed attenuator 9 is VHF voltage-controlled The output end of pierce circuit.In the present embodiment, the LC oscillating circuit 2 is made of triode and the second inductance, in this knot Under structure, control voltage improves the reverse bias of triode, and the vague and general area in triode increases, two conductor surfaces apart from elongated, electricity Holding reduces, and the output frequency of LC concussion improves;Conversely, triode endoparasitism capacitor becomes larger when reducing the reverse bias of triode, Its output frequency reduces, to reach the control by tuning voltage, adjusts the frequency purpose of output.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims (6)

1. a kind of voltage-controlled oscillator circuit, which is characterized in that including sequentially connected first amplifier, LC oscillating circuit, first Fixed attenuator, low-pass filter, the first power splitter;Two output ends of first power splitter pass through the second amplification respectively Device, third amplifier are connect with two input terminals of the second power splitter, and the output end of second power splitter declines with the second fixation Subtract the input terminal connection of device, the output end of second fixed attenuator is the output end of VHF voltage-controlled oscillator circuit;
The LC oscillating circuit includes the first variable capacitance of concatenation, the second variable capacitance, first variable capacitance, second can The common end that power transformation is held is connect with the output end of the first amplifier, while the first variable capacitance of the concatenation, the second variable capacitance With an inductance and connect;The both ends of the inductance are connect with the collector of the first triode, the second triode respectively;Described 1st The collector of pole pipe also passes through the first fixed capacity and connect with the base stage of the second triode;The collector of second triode is logical The second fixed capacity is crossed to connect with the base stage of the first triode;The base stage of first triode and the base stage of the second triode pass through string First resistor, the second resistance connect connects;Meanwhile first the emitter-base bandgap grading of triode and the second triode connect with a current source.
2. circuit according to claim 1, which is characterized in that first amplifier is OP27GS.
3. circuit according to claim 1, which is characterized in that second amplifier, the second amplifier are PSA4- 5043。
4. circuit according to claim 1, which is characterized in that first fixed attenuator, the second fixed attenuator are PAT1220C-2dB-T。
5. circuit according to claim 1, which is characterized in that first power splitter, the second power splitter are SBTC-2- 10。
6. circuit according to claim 1, which is characterized in that first triode and the second triode are brilliant for NPN type Body pipe.
CN201821944429.6U 2018-11-24 2018-11-24 A kind of voltage-controlled oscillator circuit Expired - Fee Related CN209016994U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821944429.6U CN209016994U (en) 2018-11-24 2018-11-24 A kind of voltage-controlled oscillator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821944429.6U CN209016994U (en) 2018-11-24 2018-11-24 A kind of voltage-controlled oscillator circuit

Publications (1)

Publication Number Publication Date
CN209016994U true CN209016994U (en) 2019-06-21

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CN201821944429.6U Expired - Fee Related CN209016994U (en) 2018-11-24 2018-11-24 A kind of voltage-controlled oscillator circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI783554B (en) * 2021-06-25 2022-11-11 瑞昱半導體股份有限公司 Voltage control oscillator apparatus and power supply stabilizing circuit of the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI783554B (en) * 2021-06-25 2022-11-11 瑞昱半導體股份有限公司 Voltage control oscillator apparatus and power supply stabilizing circuit of the same

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20190621

Termination date: 20211124

CF01 Termination of patent right due to non-payment of annual fee