A self-excited solid-state radio frequency generator
A radio frequency generator, self-excited technology, applied in the field of radio frequency, can solve the problems of slow adjustment speed, poor frequency stability, inability to calibrate the output power, etc., and achieve the effect of avoiding extinguishing and fast circuit response.
Active Publication Date: 2020-06-23
BEIJING BOHUI INNOVATION TECH
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] The present invention proposes a self-excited solid-state radio frequency generator. In order to solve the problems of poor frequency stability, output power that cannot be calibrated and slow adjustment speed in existing radio frequency transmitters, the present invention adopts the following technology Program:
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0018] combine figure 1 As shown, in this embodiment, the first power device N1 and the second power device N2 are two N-channel LDMOS RF power devices BLF578, which form a Class D amplifier circuit, and the first power device N1 and the second power device N2 take turns Turn on to complete power amplification; VDD is a 5V reference source, adjust the DC bias voltage through resistor R1 and resistor R2, and connect to the gate in series through resistor R3 and resistor R4; capacitor C3 and the third load coil L3 form an LC resonant circuit; Capacitor C9 and capacitor C10 are used as feedback capacitors to take out a small part of the voltage signal, respectively cross-feedback to the gates of the first power device N1 and the second power device N2 as excitation signals, forming a positive feedback oscillation circuit. Capacitor C1, capacitor C2, capacitor C3, capacitor C9 and capacitor C10 are high-power radio frequency capacitors. By changing the capacitance of capacitor C3...
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
Login to View More Abstract
The invention provides a self-excited solid-state radio frequency generator, which belongs to the technical field of radio frequency. The self-excited solid-state radio frequency generator includes an amplifying circuit, a resonant circuit, a feedback capacitor, a first high-frequency choke coil and a second high-frequency choke coil; the feedback capacitor is used to feed back a predetermined voltage signal to the gate of the amplifying circuit as The excitation signal, the resonant circuit is used to provide a resonant signal for the amplifying circuit, the first high-frequency choke coil and the second high-frequency choke coil are used for energy storage and energy release when the two power devices in the amplifying circuit are turned on alternately , and form an oscillating signal on the resonant circuit and perform power output. The present invention forms an oscillating signal on the third high-frequency coil and performs power output. The output power is coupled to the excited argon gas in the torch to form a plasma torch. When the load changes, the frequency of the resonant circuit changes accordingly. Due to the circuit response speed Faster, to avoid the plasma torch being extinguished due to detuning caused by excessive load changes.
Description
technical field [0001] The invention relates to a self-excited solid-state radio frequency generator, which belongs to the technical field of radio frequency. Background technique [0002] Inductively Coupled Plasma Mass Spectrometer / Spectrometer is a new type of analysis technology that can quickly and simultaneously detect almost all elements on the periodic table. It has become recognized as the most powerful element analysis method and has been widely used in various fields of the national economy. [0003] The high-power radio frequency generator is one of the important core components of the inductively coupled plasma spectrometer / mass spectrometer. Its main function is to generate powerful high-frequency electric energy through the high-power high-frequency generator, and generate high-frequency electromagnetic fields through the coupling coil to form Stable high-frequency electric energy is sent to the plasma torch to excite and maintain the high-temperature plasma f...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H05H1/46
CPCH05H1/46H05H2242/20
Inventor 李毅郭洪民
Owner BEIJING BOHUI INNOVATION TECH