Charge pump, phase-locked loop circuit, and clock control apparatus
AssigneeHuawei Technologies Co., Ltd.
InventorsNa Guo, Qing Min
Life of this patent
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Abstract
One example charge pump is provided. The example charge pump includes a degeneration circuit, a charging current source transistor, a switch circuit and a discharging current source transistor. The charging current source transistor provides a charging current. The degeneration circuit is coupled between a first terminal of the charging current source transistor and a power supply terminal. The degeneration circuit degrades a first voltage corresponding to the power supply terminal to a second voltage. The switch circuit is coupled between a second terminal of the charging current source transistor and a load. The switch circuit controls a charging current output to the load.
Claims13
A charge pump, comprising:
- a charging current source transistor that provides a charging current;
- a degeneration circuit, coupled between a first terminal of the charging current source transistor and a power supply terminal, wherein the degeneration circuit degrades a first voltage corresponding to the power supply terminal to a second voltage;
- a switch circuit, coupled between a second terminal of the charging current source transistor and a load, wherein the switch circuit controls the charging current output to the load;
- and
- a discharging current source transistor, wherein a first terminal of the discharging current source transistor is coupled to the load, and the first terminal of the discharging current source transistor is coupled directly to the switch circuit, and a second terminal of the discharging current source transistor is coupled to ground.
Dependencies are inferred from the claim text.