Oscillator for adiabatic computational circuitry
View Patent ↗An adiabatic resonator, an adiabatic oscillator, and an adiabatic oscillator system are disclosed. An adiabatic system is one that ideally transfers no heat outside of the system, thereby reducing the required operating power. The adiabatic resonator, which includes a plurality of tank circuits, acts as an energy reservoir, the missing aspect of previously attempted adiabatic computational systems. By using the adiabatic resonator as a feedback element with an amplifier, an adiabatic oscillator is formed. An adiabatic oscillator system is formed with a primary adiabatic oscillator feeding a plurality of secondary adiabatic oscillators. In this manner, the adiabatic oscillator system may be used to generate the multiple clock signals required of adiabatic computational logic elements, such as Split-level Charge Recovery Logic and 2-Level Adiabatic Logic. The adiabatic oscillator system stores enough energy to drive many individual adiabatic computational logic elements, permitting implementation of complex logic circuits.
1. An adiabatic oscillator system comprising:
a primary adiabatic oscillator including a primary adiabatic oscillator output;
a buffer electrically coupled to the primary adiabatic oscillator output, the buffer including a buffer output, the buffer adapted to decrease an effect of next-stage loading;
N secondary adiabatic oscillators each including a respective secondary adiabatic oscillator output; and
N phase-shifting circuits each electrically coupled to the buffer output, each of the N phase-shifting circuits including a respective phase-shifting circuit output, each of the N secondary adiabatic oscillators electrically coupled to a respective one of the phase-shifting circuit outputs, each of the N phase-shifting circuits adapted to induce a corresponding phase shift at a corresponding one of the secondary adiabatic oscillator outputs;
the primary adiabatic oscillator and each of the N secondary adiabatic oscillators each including:
an amplifier; and
an adiabatic resonator, the adiabatic resonator adapted to provide feedback to the amplifier, the adiabatic resonator including a plurality of tank circuits.
2. The adiabatic oscillator system of claim 1 , wherein the amplifier in each of the primary adiabatic oscillator and the N secondary adiabatic oscillators is one of an inverting amplifier, a differential amplifier, a cascode-connected amplifier, a class A amplifier, a class AB amplifier, a class C amplifier, a class D amplifier, a class E amplifier, or a class F amplifier.
3. The adiabatic oscillator system of claim 1 , wherein each of the plurality of tank circuits includes:
a capacitor or capacitive reactance element; and
an inductor or an inductive reactance element, the capacitor or capacitive reactance element and the inductor or inductive reactance element electrically connected in series or parallel.
4. The adiabatic oscillator system of claim 3 , wherein the inductor in each of the plurality of tank circuits has a same value.
5. The adiabatic oscillator system of claim 1 , wherein each adiabatic resonator further includes a plurality of winding-weighted transformers or weighted waveguide transformers, the plurality of tank circuits being electrically connected in series using the plurality of winding-weighted transformers or weighted waveguide transformers, and each of the winding-weighted transformers or weighted waveguide transformers having a corresponding weighting factor.
6. The adiabatic oscillator system of claim 5 , wherein each of the weighting factors corresponds to a respective Fourier series weighting factor.
7. The adiabatic oscillator system of claim 1 , wherein the plurality of tank circuits includes at least three tank circuits.
8. The adiabatic oscillator system of claim 1 , wherein N equals 3 or 5.
9. The adiabatic oscillator system of claim 1 , wherein the primary adiabatic oscillator further includes a startup circuit.
10. The adiabatic oscillator system of claim 1 , wherein the primary adiabatic oscillator and each of the N secondary adiabatic oscillators each outputs a corresponding substantially trapezoidal waveform.
11. An adiabatic oscillator comprising:
an amplifier; and
an adiabatic resonator, the adiabatic resonator adapted to provide feedback to the amplifier, the adiabatic resonator including a plurality of tank circuits;
wherein each of the plurality of tank circuits includes a capacitor or capacitive reactance element and an inductor or inductive reactance element, the capacitor or capacitive reactance element and the inductor or inductive reactance element electrically connected in series or parallel.
12. The adiabatic oscillator of claim 11 , wherein the amplifier is one of an inverting amplifier, a differential amplifier, a cascode-connected amplifier, a class A amplifier, a class AB amplifier, a class C amplifier, a class D amplifier, a class E amplifier, or a class F amplifier.
13. The adiabatic oscillator of claim 11 , wherein the inductor in each of the plurality of tank circuits has a same value.
14. The adiabatic oscillator of claim 11 , wherein the adiabatic resonator further includes a plurality of winding-weighted transformers or weighted waveguide transformers, the plurality of tank circuits being electrically connected in series using the plurality of winding-weighted transformers or weighted waveguide transformers, each of the winding-weighted transformers or weighted waveguide transformers having a corresponding weighting factor, wherein each of the weighting factors corresponds to a respective Fourier series weighting factor.
15. The adiabatic oscillator of claim 11 , wherein the plurality of tank circuits includes at least three tank circuits.
16. The adiabatic oscillator of claim 11 , further comprising a startup circuit.
17. The adiabatic oscillator of claim 11 , wherein the adiabatic oscillator outputs a substantially trapezoidal waveform.
18. An adiabatic resonator comprising:
a plurality of tank circuits; and
a plurality of winding-weighted transformers or weighted waveguide transformers, the plurality of tank circuits being electrically connected in series using the plurality of winding-weighted transformers or weighted waveguide transformers, each of the winding-weighted transformers or weighted waveguide transformers having a corresponding weighting factor, wherein each of the weighting factors corresponds to a respective Fourier series weighting factor;
wherein each of the plurality of tank circuits includes a capacitor or capacitive reactance element and an inductor or inductive reactance element, the capacitor or capacitive reactance element and the inductor or inductive reactance element electrically connected in series or parallel.
19. The adiabatic resonator of claim 18 , wherein the inductor in each of the plurality of tank circuits has a same value.