Design Of Large Power MOSFET Oscillator Circuit

The paper primary coverage is designs the single-valve sine-wave generator with MOSFET, also requests the oscillator to be able to realize the high efficiency, the output is 100W, the oscilation frequency is the 13.56MHz output signal.Along with the science and technology development and electronic products in reality application, the oscillator high efficiency, the high-frequency is the development inevitable trend. At present, the oscillator already in the television station, the broadcasting station, the handset, the military electronic countermeasure, the correspondence, the broadcast, the automatic control, the measuring appliance survey, the high-frequency heating and the supersonic crack detection and the industry domain and so on obtains the widespread application. In the wireless transmitter carrier supply oscillator, in the superheterodyne receiver local oscillation supply oscillator, in the electronic surveying instrument sine wave supply oscillator, in the number system clock supply oscillator and so on, in the high-frequency heating equipment and the medical electrotherapy instrument sine alternation energy, all is sine-wave generator in reality application.The oscillator is through the autoexcitation way the direct-current electrical energy transformation for the exchange electrical energy one kind of simulation electronic circuit, namely the regeneration signal which introduces from the out-port as the power amplifier input signal controls the amplifier, is the cocurrent energy conversion which provides the direct-current power supply for presses the signal rule change the alternation energy electric circuit.In the electronic installation, the sine-wave generator many is uses the regenerative amplifier the principle constitution, is called the feedback generator (its operating frequency scope is hertz～several hundred megacycles per second).It is by the basic amplifier, the frequency selective network and the regeneration network is composed, power MOSFET amplifier we use are class-C power MOSFET amplifier.This paper all gave the specify to the transistor selection and the transistor basic characteristic, in which third chapter introduced in detail the oscillator composition and each constituent (amplifier, frequency selective network, feedback network) have all made the brief analysis including the oscillator starting of oscillation condition and the equilibrium condition; class-C power amplifier principle of work, dynamic characteristic, output and efficiency computation; Frequency selective network constitutes which by the LC resonant tank. Fourth chapter mainly says is in the oscillator main body electric circuit and the electric circuit various primary devices parameter determination.Fifth chapter mainly is the electric circuit simulation and the debugging.