Oscillator circuit e.g. quadrature- voltage-controlled-oscillator, has coupling unit connected with source-drain connections of transistors of control unit-part circuit and arranged such that power coupling of oscillator stages is possible

摘要

#CMT# #/CMT# The circuit has two oscillator stages (180, 181) each comprising an oscillator-partial circuit with an inductor, a capacitor and two output nodes. A control unit-partial circuit has two transistors and a coupling unit for coupling the stages. The coupling unit is connected with source-drain connections of the transistors of the control unit-partial circuit and arranged such that power coupling of the oscillator stages is possible. #CMT#USE : #/CMT# Oscillator circuit e.g. quadrature- voltage-controlled-oscillator. #CMT#ADVANTAGE : #/CMT# The circuit avoids the need for an additional component beside an individual couple coil for the oscillator stages, thus reducing required space of the coupling of the individual stages and realizing the coupling in a simple manner. The circuit provides less electric power consumption, less phase noise and a firm phasing of the output signal. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic diagram of an oscillator circuit. 100 : Quadrature- voltage-controlled-oscillator (VCO) 109, 110 : Inductors 121, 123 : Capacitors 180, 181 : Oscillator stages.