Patent ID: 7038550

Claim:
A circuit, realizing a new oscillator circuit with a Smart Current Controlled (SCC) Resonator Driver and accounting for differences in operation at positive and negative half-waves of oscillation cycles, comprising: an oscillation generating circuit in form of a basic three-point oscillator configuration, having three nodes ( 1 , 2 and 3 ) and containing a resonator two-pole located between said first node 1 and said second node 2 ; a terminal pin for supply voltage connection; a terminal pin for ground connection, which is tied to said third node 3 ; two capacitors and one resistor as passive components, whereby said passive components are embedding said resonator two-pole between said two capacitors, all components arranged in PI-configuration, bridging said resonator with said resistor and arranged in such a way, that capacitor one is tied with its first pole to said first node 1 and capacitor two, also with its first pole, is tied to said second node 2 ; a Field Effect Transistor (FET) for inducing and sustaining resonator two-pole controlled oscillations as basic active component; a first current source as active supply component connected to said supply voltage and arranged in such a way, that said active supply component supplying a bias-current is located between said voltage supply terminal and said second node 2 ; and a second current source as active ground component connected to ground, whereby said FET as basic active component, supplied by said first current source as active supply component is controlled by said second current source as active ground component and whereby said three active components are arranged in such a way, that the gate of the FET is tied to said first node 1 , one side of the FET channel tied to said second node 2 and the other side of the FET channel is tied to said second current source thus allowing for a resonator-current stabilization during said different operations at positive and negative half-waves of oscillation cycles, and thus effectively stabilizing said oscillation generation especially with regard to frequency and amplitude stability.