CN210518226U - Wideband voltage controlled oscillator for digital interphone - Google Patents
Wideband voltage controlled oscillator for digital interphone Download PDFInfo
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- CN210518226U CN210518226U CN201921594396.1U CN201921594396U CN210518226U CN 210518226 U CN210518226 U CN 210518226U CN 201921594396 U CN201921594396 U CN 201921594396U CN 210518226 U CN210518226 U CN 210518226U
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- 230000010355 oscillation Effects 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 96
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model discloses a broadband voltage controlled oscillator for digital interphone. The design comprises a first gating control circuit, a second gating control circuit, a first LC resonance circuit, a second LC resonance circuit and an oscillation amplifying circuit. According to the design, through gating control of the two LC resonant circuits, the VCO realizes the working bandwidth of 80MHz, and the working frequency bandwidth is doubled compared with the working frequency bandwidth of the VCO of a common single LC resonant circuit. Further increase of the operating frequency bandwidth can also be achieved by adding an LC resonant circuit and a gating control interface.
Description
Technical Field
The utility model relates to the field of communications, especially, relate to a broadband Voltage Controlled Oscillator (VCO) for digital intercom.
Background
At present, a VCO applied to a digital interphone device in the prior art and ever in the prior art generally comprises an LC resonant circuit, an oscillation amplifier and the like, and an oscillator with various frequencies is realized by designing parameter values of components in the circuit. However, the existing VCO is in the form of a single resonant circuit, and has the problem of narrow working frequency bandwidth, and the application requirement of the digital interphone with wider working frequency bandwidth cannot be met.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a broadband voltage controlled oscillator for digital intercom. According to the design, a plurality of LC resonance circuits with different frequency bands are connected in parallel, connected to a common oscillation amplifier through coupling capacitors, and the corresponding LC resonance circuits are selected through a gating control circuit, so that the working frequency bandwidth is multiplied.
The utility model adopts the technical proposal that: the broadband voltage-controlled oscillator for the digital interphone is characterized by comprising a first gating control circuit, a second gating control circuit, a first LC resonant circuit, a second LC resonant circuit and an oscillation amplifying circuit, wherein the first gating control circuit comprises a resistor R2, an inductor L3 and a switch PIN tube D9; the second gating control circuit comprises a resistor R1, an inductor L4 and a switch PIN diode D10; the first LC resonant circuit comprises an inductor L1, a variable capacitance diode D1, a variable capacitance diode D3, a variable capacitance diode D7, a variable capacitance diode D8, a capacitor C1, an inductor L5, an inductor L7 and a capacitor C4; the second LC resonant circuit comprises an inductor L2, a variable capacitance diode D2, a variable capacitance diode D4, a variable capacitance diode D5, a variable capacitance diode D6, a capacitor C2, an inductor L6, an inductor L8 and a capacitor C3; the oscillation amplifying circuit comprises a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a resistor R3, a resistor R4, a resistor R5, an inductor L9, an inductor L10, an inductor L11 and a triode Q1.
One end of a resistor R2 of the first gating control circuit is connected with a control interface SW1, the other end of a resistor R2 is connected with one end of an inductor L3, the other end of the inductor L3 is connected with the anode of a switch PIN diode D9, and the cathode of the switch PIN diode D9 is grounded.
One end of a resistor R1 of the second gating control circuit is connected with a control interface SW2, the other end of a resistor R1 is connected with one end of an inductor L4, the other end of the inductor L4 is connected with the anode of a switch PIN diode D10, and the cathode of the switch PIN diode D10 is grounded.
One end of an inductor L1 of the first LC resonance circuit is connected with the tuning interface VT, the other end of the inductor L1 is connected with the cathode of the variable capacitance diode D1, the cathode of the variable capacitance diode D3, the cathode of the variable capacitance diode D7 and the cathode of the variable capacitance diode D8, the anode of the variable capacitance diode D1 and the anode of the variable capacitance diode D3 are respectively grounded, the anode of the variable capacitance diode D7 is connected with the anode of the variable capacitance diode D8, and simultaneously, one end of a capacitor C1 and one end of an inductor L5 are connected, the other end of the inductor L5 is grounded, the other end of a capacitor C1 is connected with one end of the inductor L7, one end of the capacitor C4 and the anode of the switch PIN diode D9, and the other end of the inductor L7 and the other end of the capacitor C4 are respectively grounded.
One end of an inductor L2 of the second LC resonance circuit is connected with a tuning interface VT and is connected with one end of an inductor L1 of the first LC resonance circuit, the other end of an inductor L2 is connected with the cathode of a variable capacitance diode D2, the cathode of a variable capacitance diode D4, the cathode of a variable capacitance diode D5 and the cathode of a variable capacitance diode D6, the anode of a variable capacitance diode D2 and the anode of a variable capacitance diode D4 are respectively grounded, the anode of a variable capacitance diode D5 is connected with the anode of a variable capacitance diode D6 and is also connected with one end of a capacitor C2 and one end of an inductor L6, the other end of a capacitor C2 is connected with one end of an inductor L8, one end of a capacitor C3 and the anode of a switch PIN diode D10, and the other end of an inductor L6, the other end of an inductor L8 and the other end of a capacitor C3 are respectively grounded;
the positive electrode of a switch PIN diode D9 of the first gating control circuit and the positive electrode of a switch PIN diode D10 of the first gating control circuit are respectively connected with one end of a capacitor C8, one end of an inductor L9 and the base electrode of a triode Q1 of the oscillation amplifying circuit through a coupling capacitor C5 and a coupling capacitor C6, the other end of a capacitor C8 is connected with one end of a capacitor C9 and one end of a capacitor C10, the other end of a capacitor C10 is connected with one end of a resistor R4 and the emitter electrode of a triode Q1, the other end of a resistor R4 is connected with one end of an inductor L10, the other end of an inductor L9 is connected with one end of a resistor R3 and one end of a capacitor C7, the other end of a resistor R3, one end of the capacitor C3 and one end of the inductor L3 are simultaneously connected with a +5V power supply, the other end of the resistor R3 is connected with the other end of the inductor L3, one end of the capacitor C3 is connected with, the other end of the capacitor C7, the other end of the capacitor C9, the other end of the capacitor C11, and the other end of the inductor L10 are grounded, respectively.
The utility model has the advantages that: through gating control of the two LC resonant circuits, the VCO realizes the 80MHz working bandwidth which is doubled compared with the working frequency bandwidth of the VCO of a common single LC resonant circuit. Further increase of the operating frequency bandwidth can also be achieved by adding an LC resonant circuit and a gating control interface.
Drawings
Fig. 1 is an electrical schematic diagram of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1, the design includes a first gate control circuit, a second gate control circuit, a first LC resonant circuit, a second LC resonant circuit and an oscillation amplifying circuit, wherein the first gate control circuit includes a resistor R2, an inductor L3 and a switch PIN diode D9; the second gating control circuit comprises a resistor R1, an inductor L4 and a switch PIN diode D10; the first LC resonant circuit comprises an inductor L1, a variable capacitance diode D1, a variable capacitance diode D3, a variable capacitance diode D7, a variable capacitance diode D8, a capacitor C1, an inductor L5, an inductor L7 and a capacitor C4; the second LC resonant circuit includes an inductor L2, a variable capacitance diode D2, a variable capacitance diode D4, a variable capacitance diode D5, a variable capacitance diode D6, a capacitor C2, an inductor L6, an inductor L8, and a capacitor C3; the oscillation amplifying circuit comprises a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a resistor R3, a resistor R4, a resistor R5, an inductor L9, an inductor L10, an inductor L11 and a triode Q1.
One end of a resistor R2 of the first gating control circuit is connected with a control interface SW1, the other end of a resistor R2 is connected with one end of an inductor L3, the other end of the inductor L3 is connected with the anode of a switch PIN tube D9, and the cathode of the switch PIN tube D9 is grounded.
One end of a resistor R1 of the second gating control circuit is connected with a control interface SW2, the other end of a resistor R1 is connected with one end of an inductor L4, the other end of the inductor L4 is connected with the anode of a switch PIN tube D10, and the cathode of the switch PIN tube D10 is grounded.
One end of an inductor L1 of the first LC resonant circuit in the design is connected with the tuning interface VT, the other end of the inductor L1 is connected with the cathode of a variable capacitance diode D1, the cathode of a variable capacitance diode D3, the cathode of a variable capacitance diode D7 and the cathode of a variable capacitance diode D8, the anode of a variable capacitance diode D1 and the anode of a variable capacitance diode D3 are respectively grounded, the anode of a variable capacitance diode D7 is connected with the anode of a variable capacitance diode D8, meanwhile, one end of a capacitor C1 and one end of an inductor L5 are connected, the other end of the inductor L5 is grounded, the other end of a capacitor C1 is connected with one end of an inductor L7, one end of a capacitor C4 and the anode of a switch PIN diode D9, and the other end of an inductor L7 and the other end of a capacitor C4 are respectively grounded.
One end of an inductor L2 of the second LC resonance circuit in the design is connected with the tuning interface VT and is connected with one end of an inductor L1 of the first LC resonance circuit, the other end of the inductor L2 is connected with the cathode of a variable capacitance diode D2, the cathode of a variable capacitance diode D4, the cathode of a variable capacitance diode D5 and the cathode of a variable capacitance diode D6, the anode of a variable capacitance diode D2 and the anode of a variable capacitance diode D4 are respectively grounded, the anode of a variable capacitance diode D5 is connected with the anode of a variable capacitance diode D6, and is also connected with one end of a capacitor C2 and one end of an inductor L6, the other end of a capacitor C2 is connected with one end of an inductor L8, one end of a capacitor C3 and the anode of a switch PIN diode D10, and the other end of an inductor L6, the other end of an inductor L8 and the other end of a capacitor C3 are respectively grounded.
The positive electrode of a switch PIN diode D9 of the first gating control circuit and the positive electrode of a switch PIN diode D10 of the first gating control circuit are respectively connected with one end of a capacitor C8, one end of an inductor L9 and a base electrode of a triode Q1 of an oscillation amplifying circuit through a coupling capacitor C5 and a coupling capacitor C6, the other end of a capacitor C8 is connected with one end of a capacitor C9 and one end of a capacitor C68628, the other end of a capacitor C9 is connected with one end of a resistor R4 and an emitter electrode of a triode Q1, the other end of a resistor R4 is connected with one end of an inductor L10, the other end of an inductor L9 is connected with one end of a resistor R3 and one end of a capacitor C7, the other end of a resistor R3, one end of the capacitor C3 and one end of the inductor L3, and is simultaneously connected with a +5V power supply, the other end of the resistor R3 is connected with the other end of the inductor L3, one end of the other end of the capacitor C36, the other end of the capacitor C7, the other end of the capacitor C9, the other end of the capacitor C11, and the other end of the inductor L10 are grounded, respectively.
The design principle of the utility model is as follows: when the input voltage range of the tuning interface VT is 1V-4V, the vibration frequency range of the first LC resonance circuit meets 400 MHz-440 MHz, and when the input voltage range of the tuning interface VT is 1V-4V, the vibration frequency range of the LC resonance circuit 2 meets 440 MHz-480 MHz. When the control interface SW1 inputs a low level and the control interface SW2 inputs a high level, the switch PIN tube D9 is cut off, the switch PIN tube D10 is switched on, so that the second LC resonance circuit is short-circuited to the ground, the first LC resonance circuit is connected to the oscillation amplifying circuit through the coupling capacitor C5 to form a VCO circuit, and the tuning working frequency range is 400 MHz-440 MHz. When the control interface SW2 inputs a low level and the control interface SW1 inputs a high level, the switch PIN tube D10 is cut off, the switch PIN tube D9 is switched on, so that the first LC resonance circuit is short-circuited to the ground, the second LC resonance circuit is connected to the oscillation amplifying circuit through the coupling capacitor C6 to form a VCO circuit, and the tuning working frequency range is 440 MHz-480 MHz.
Claims (1)
1. A broadband voltage-controlled oscillator for a digital interphone is characterized by comprising a first gating control circuit, a second gating control circuit, a first LC resonance circuit, a second LC resonance circuit and an oscillation amplifying circuit,
the first gating control circuit comprises a resistor R2, an inductor L3 and a switch PIN diode D9; the second gating control circuit comprises a resistor R1, an inductor L4 and a switch PIN diode D10; the first LC resonant circuit comprises an inductor L1, a variable capacitance diode D1, a variable capacitance diode D3, a variable capacitance diode D7, a variable capacitance diode D8, a capacitor C1, an inductor L5, an inductor L7 and a capacitor C4; the second LC resonant circuit comprises an inductor L2, a variable capacitance diode D2, a variable capacitance diode D4, a variable capacitance diode D5, a variable capacitance diode D6, a capacitor C2, an inductor L6, an inductor L8 and a capacitor C3; the oscillation amplifying circuit comprises a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a resistor R3, a resistor R4, a resistor R5, an inductor L9, an inductor L10, an inductor L11 and a triode Q1;
one end of a resistor R2 of the first gating control circuit is connected with a control interface SW1, the other end of a resistor R2 is connected with one end of an inductor L3, the other end of the inductor L3 is connected with the anode of a switch PIN diode D9, and the cathode of the switch PIN diode D9 is grounded;
one end of a resistor R1 of the second gating control circuit is connected with a control interface SW2, the other end of a resistor R1 is connected with one end of an inductor L4, the other end of the inductor L4 is connected with the anode of a switch PIN diode D10, and the cathode of the switch PIN diode D10 is grounded;
one end of an inductor L1 of the first LC resonance circuit is connected with the tuning interface VT, the other end of the inductor L1 is connected with the cathode of a variable capacitance diode D1, the cathode of a variable capacitance diode D3, the cathode of a variable capacitance diode D7 and the cathode of a variable capacitance diode D8, the anode of a variable capacitance diode D1 and the anode of a variable capacitance diode D3 are respectively grounded, the anode of a variable capacitance diode D7 is connected with the anode of a variable capacitance diode D8 and is also connected with one end of a capacitor C1 and one end of an inductor L5, the other end of the inductor L5 is grounded, the other end of a capacitor C1 is connected with one end of an inductor L7, one end of a capacitor C4 and the anode of a switch PIN diode D9, and the other end of the inductor L7 and the other end of a capacitor C4 are respectively grounded;
one end of an inductor L2 of the second LC resonance circuit is connected with a tuning interface VT and is connected with one end of an inductor L1 of the first LC resonance circuit, the other end of an inductor L2 is connected with the cathode of a variable capacitance diode D2, the cathode of a variable capacitance diode D4, the cathode of a variable capacitance diode D5 and the cathode of a variable capacitance diode D6, the anode of a variable capacitance diode D2 and the anode of a variable capacitance diode D4 are respectively grounded, the anode of a variable capacitance diode D5 is connected with the anode of a variable capacitance diode D6 and is also connected with one end of a capacitor C2 and one end of an inductor L6, the other end of a capacitor C2 is connected with one end of an inductor L8, one end of a capacitor C3 and the anode of a switch PIN diode D10, and the other end of an inductor L6, the other end of an inductor L8 and the other end of a capacitor C3 are respectively grounded;
the positive electrode of a switch PIN diode D9 of the first gating control circuit and the positive electrode of a switch PIN diode D10 of the first gating control circuit are respectively connected with one end of a capacitor C8, one end of an inductor L9 and the base electrode of a triode Q1 of the oscillation amplifying circuit through a coupling capacitor C5 and a coupling capacitor C6, the other end of a capacitor C8 is connected with one end of a capacitor C9 and one end of a capacitor C10, the other end of a capacitor C10 is connected with one end of a resistor R4 and the emitter electrode of a triode Q1, the other end of a resistor R4 is connected with one end of an inductor L10, the other end of an inductor L9 is connected with one end of a resistor R3 and one end of a capacitor C7, the other end of a resistor R3, one end of the capacitor C3 and one end of the inductor L3 are simultaneously connected with a +5V power supply, the other end of the resistor R3 is connected with the other end of the inductor L3, one end of the capacitor C3 is connected with, the other end of the capacitor C7, the other end of the capacitor C9, the other end of the capacitor C11, and the other end of the inductor L10 are grounded, respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921594396.1U CN210518226U (en) | 2019-09-24 | 2019-09-24 | Wideband voltage controlled oscillator for digital interphone |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921594396.1U CN210518226U (en) | 2019-09-24 | 2019-09-24 | Wideband voltage controlled oscillator for digital interphone |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504921A (en) * | 2019-09-24 | 2019-11-26 | 天津七一二通信广播股份有限公司 | A kind of wideband voltage controlled oscillator applied to digital walkie-talkie |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504921A (en) * | 2019-09-24 | 2019-11-26 | 天津七一二通信广播股份有限公司 | A kind of wideband voltage controlled oscillator applied to digital walkie-talkie |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211111 Address after: 300140 No. 185, Xinda Road, Hebei District, Tianjin Patentee after: TIANJIN 712 MOBILE COMMUNICATIONS Co.,Ltd. Address before: 300462 No. 141, North Street, West District, economic and Technological Development Zone, Binhai New Area, Tianjin Patentee before: TIANJIN 712 COMMUNICATION & BROADCASTING Co.,Ltd. |
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| CP03 | Change of name, title or address |
Address after: 300140 No. 185, new great road, Tianjin, Hebei District Patentee after: Tianjin 712 Mobile Communication Co.,Ltd. Country or region after: China Address before: 300140 No. 185, new great road, Tianjin, Hebei District Patentee before: TIANJIN 712 MOBILE COMMUNICATIONS Co.,Ltd. Country or region before: China |