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US 2018/0019005 A1Published application
Charge pump apparatus
AssigneeeMemory Technology Inc.
InventorChi-Yi Shao
Life of this patent
Estimating the term…
Abstract
A charge pump apparatus is provided. A two-phase clock signal and a four-phase clock signal for respectively driving a two-phase charge pump circuit and a four-phase charge pump circuit are generated according to delay signals of coupling nodes between delay circuits of a ring oscillator circuit.
Claims19
A charge pump apparatus, comprising:
- a first two-phase charge pump circuit and a first four-phase charge pump circuit coupled in series, wherein the first four-phase charge pump circuit coupled to an output terminal of the first two-phase charge pump circuit;
- and
- a driving circuit, coupled to the first two-phase charge pump circuit and the first four-phase charge pump circuit, the driving circuit comprising:
- a ring oscillator circuit, comprising:
- a plurality of delay circuits connected in series as a delay circuit chain, wherein an output terminal of the delay circuit chain is coupled to an input terminal of the delay circuit chain, and the input terminal of the delay circuit chain receives an input clock signal;
- and
- a logic circuit, coupled to the ring oscillator circuit, the first two-phase charge pump circuit and the first four-phase charge pump circuit, wherein the logic circuit generates a first two-phase clock signal for driving the first two-phase charge pump circuit and a first four-phase clock signal for driving the first four-phase charge pump circuit according to a plurality of delay signals of coupling a plurality of nodes between the delay circuits.
4 more elements
A charge pump apparatus, comprising:
- a two-phase charge pump circuit and a plurality of four-phase charge pump circuits coupled in series, wherein the plurality of four-phase charge pump circuits coupled to an output terminal of the two-phase charge pump circuit;
- and
- a driving circuit, coupled to the two-phase charge pump circuit and the four-phase charge pump circuits, the driving circuit comprising:
- a ring oscillator circuit, comprising:
- a plurality of delay circuits connected in series as a delay circuit chain, wherein an output terminal of the delay circuit chain is coupled to an input terminal of the delay circuit chain, the input terminal of the delay circuit chain receives an input clock signal;
- and
- a logic circuit, coupled to the ring oscillator circuit, the two-phase charge pump circuit and the four-phase charge pump circuits, generating a two-phase clock signal for driving the two-phase charge pump circuit and a plurality of first four-phase clock signals and a plurality of second four-phase clock signals for driving the four-phase charge pump circuits according to a plurality of delay signals of coupling a plurality of nodes between the delay circuits, wherein the first four-phase clock signals are configured to drive corresponding odd-numbered four-phase charge pump circuits, and the second four-phase clock signals are configured to drive corresponding even-numbered four-phase charge pump circuits.
4 more elements
Dependencies are inferred from the claim text.