An oscillator circuit, comprising: a resonant tank including a first capacitor formed on a semiconductor substrate, a first inductor formed on the semiconductor substrate, a second capacitor formed on the semiconductor substrate, and a second inductor formed on the semiconductor substrate, the first capacitor, the first inductor, the second capacitor, and the second inductor connected in a ring configuration wherein a first terminal of the first capacitor is connected to a first end terminal of the second inductor, wherein a second terminal of the first capacitor is connected to a first end terminal of the first inductor, wherein a first terminal of the second capacitor is connected to a second end terminal of the second inductor and wherein a second terminal of the second capacitor is connected to a second end terminal of the first inductor; and an amplifier circuit (1002,1004) coupled to the resonant tank and configured to amplify a signal in the resonant tank; wherein the first inductor and second inductor are tapped inductors each having a tapped input terminal at an intermediate location between their first and second end terminals; wherein the amplifier circuit (1002, 1004) includes a first inverter connected to said tapped input terminal of the first inductor and a second inverter connected to said tapped input terminal of the second inductor wherein the first inverter has its output connected to the tapped input terminal of the first inductor and its input connected to the second terminal of the first capacitor, and wherein the second inverter has its output connected to the tapped input terminal of the second inductor and its input connected to the first terminal of the first capacitor. a resonant tank including a first capacitor formed on a semiconductor substrate, a first inductor formed on the semiconductor substrate, a second capacitor formed on the semiconductor substrate, and a second inductor formed on the semiconductor substrate, the first capacitor, the first inductor, the second capacitor, and the second inductor connected in a ring configuration wherein a first terminal of the first capacitor is connected to a first end terminal of the second inductor, wherein a second terminal of the first capacitor is connected to a first end terminal of the first inductor, wherein a first terminal of the second capacitor is connected to a second end terminal of the second inductor and wherein a second terminal of the second capacitor is connected to a second end terminal of the first inductor; and an amplifier circuit (1002,1004) coupled to the resonant tank and configured to amplify a signal in the resonant tank; wherein the first inductor and second inductor are tapped inductors each having a tapped input terminal at an intermediate location between their first and second end terminals; wherein the amplifier circuit (1002, 1004) includes a first inverter connected to said tapped input terminal of the first inductor and a second inverter connected to said tapped input terminal of the second inductor wherein the first inverter has its output connected to the tapped input terminal of the first inductor and its input connected to the second terminal of the first capacitor, and wherein the second inverter has its output connected to the tapped input terminal of the second inductor and its input connected to the first terminal of the first capacitor.