Driving circuit for radio frequency dryer

Details Driving circuit for radio frequency dryer Driving circuit for radio frequency dryer

1984-03-27

1985-02-12

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1041, 34 1, H05B 608

Patent

active

044993587

ABSTRACT:
A driving circuit for supplying a radio frequency electrical signal to the applicator section of a radio frequency dryer includes a voltage controlled oscillator, supplying a signal to an amplifier circuit. The amplifier circuit supplies an amplified signal to the applicator section of the dryer via an impedance match circuit. The signal supplied to the applicator section is compared in phase with the output of the voltage controlled oscillator and phase deviations are utilized to produce a signal which controls the frequency of the voltage controlled oscillator output, such that the applicator section of the dryer is driven at its resonant frequency.

REFERENCES:
patent: 3705819 (1972-12-01), Heller et al.
patent: 3718852 (1973-02-01), Bailey
patent: 3740859 (1973-06-01), Patton et al.
patent: 3921092 (1975-11-01), Schatz
patent: 4035599 (1977-07-01), Kashyap et al.
patent: 4114010 (1978-09-01), Lewis
patent: 4280038 (1981-07-01), Havas et al.
patent: 4289946 (1981-09-01), Yarwood et al.

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