H - Electricity – 03 – F
Patent
H - Electricity
03
F
330/12, 331/55
H03F 3/191 (2006.01) H03B 5/36 (2006.01)
Patent
CA 1206536
ABSTRACT OF THE DISCLOSURE The subject of the invention is a high fre- quency bandpass smplifier with adjustable impedance, in particular for a high frequency quartz resonator. It includes a transistor connected in common base the emitter of which is connected to ground by a resistive divider bridge the mid-point of which forms the input of the amplifier. The collector of the transistor is connected to ground by a parallel circuit having one inductive side and one capacitive side, a mid-point of the inductive side or of the capacitive side forming an output of the amplifier. The base of the transistor is biased and connected to ground via a capacitor ensuring common base operation in the pass-band of the amplifier. The invention also relates to an oscillator of trans- mission type including such an amplifier and a resonator connected between the input and one output of the amplifier. The frequency of resonance of the parallel circuit is equal to a chosen frequency of the resonator.
449782
Chauvin Jacques
Molle Roger
Compagnie D'electronique Et de Piezo-Electricite
Goudreau Gage Dubuc
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