Stable constant-current bias CASCODE MMIC (Multi-Media Integrated Circuit) VCO (Voltage Controlled Oscillator)

A flow bias and stable technology, applied in electrical components, power oscillators, etc., can solve problems such as the deterioration of VCO performance indicators, and achieve the effect of stable working performance and good working performance.

Pending Publication Date: 2019-11-05
厦门英诺迅科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since in practical applications, the working voltage of VCO is usually uncertain and changes within a certain range, so this problem will lead to deterioration of VCO performance indicators, or even stop working

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Stable constant-current bias CASCODE MMIC (Multi-Media Integrated Circuit) VCO (Voltage Controlled Oscillator)
  • Stable constant-current bias CASCODE MMIC (Multi-Media Integrated Circuit) VCO (Voltage Controlled Oscillator)
  • Stable constant-current bias CASCODE MMIC (Multi-Media Integrated Circuit) VCO (Voltage Controlled Oscillator)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Such as figure 2 As shown, the present invention provides a high stability constant current bias CASCODE MMIC VCO, in a specific embodiment of the present invention, the high stability constant current bias CASCODE MMIC VCO provided by the present invention includes: VCO, buffer amplifier , constant current bias, hold circuit and output matching.

[0032] Such as image 3 As shown, the VCO is a feedback oscillator circuit using a capacitor three-point type (Coplitts). Including oscillation transistor Q1, capacitors C1-C5 and inductors L1-L3. C1 ~ C3 are feedback capacitors. C V For varactor diodes, inductors L1, L2, C4, C5 and C V The series-parallel connection constitutes an equivalent inductance L_var. When the external voltage VT changes, the inductance value of L_var changes accordingly, and the oscillation frequency changes, realizing the intelligent adjustment of the VCO oscillation frequency. Port 4 and port 5 are respectively connected to corresponding p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a stable constant-current bias CASCODE MMIC VCO. The stable constant-current bias CASCODE MMIC VCO comprises a VCO body, a buffer amplifier, a constant-current bias circuit, aholding circuit and an output matching circuit. The VCO is an oscillation frequency selection circuit controlled by external voltage, an oscillation tube of the VCO is connected with the second-stagebuffer amplifier through cascode, and a radio frequency signal of the VCO is subjected to cascade amplification through the buffer amplifier and then reaches a load through the output matching circuit. The constant-current bias circuit is used for providing constant current bias for the VCO, and the holding circuit is a resistor connected to the base electrode and the collector electrode of the buffer amplifier. When the voltage of the power supply changes, the constant-current source bias and the holding circuit are adopted to keep the quiescent current of the VCO and the quiescent bias pointof the buffer amplifier unchanged. Therefore, the circuit can stably oscillate under different power supply voltages, the oscillation frequency and the amplitude-frequency characteristic in the working bandwidth are kept unchanged, and the circuit has good and stable working performance.

Description

technical field [0001] The invention relates to a CASCODE MMIC VCO (a single-chip microwave integrated voltage-controlled oscillation circuit adopting a cascode amplifier structure), in particular to a stable constant current bias CASCODE MMIC VCO. Background technique [0002] The VCO (Voltage Controlled Oscillator) using the Cascode (cascode amplifier) ​​structure can cascade amplify the radio frequency signal, reduce the load pull effect, and make the VCO have a large output power and good output isolation. It is widely used in In the design of MMIC (Monolithic Microwave Integrated Circuit) VCO. [0003] The traditional Cascode VCO is usually biased by resistor divider. Take BJT / HBT as an example, figure 1 It is an implementation of the traditional Cascode VCO circuit. Transistors Q1 and Q2 adopt cascode cascade connection, and VCC passes through resistor R b1 , R b2 and R b3 Voltage biases the circuit. [0004] Assuming that the transistor works in the enlarged re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H03B1/04H03B5/12
CPCH03B1/04H03B5/1203
Inventor 高怀
Owner 厦门英诺迅科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap