×

CHARGE PUMP HAVING RAMP RATE CONTROL

  • US 20120049917A1
  • Filed: 08/27/2010
  • Published: 03/01/2012
  • Est. Priority Date: 08/27/2010
  • Status: Active Grant
First Claim
Patent Images

1. A charge pump comprising:

  • a first counter having a control input for receiving a control signal, and an output for providing a first count value, wherein the first count value is incremented in response to the control signal being a first logic state and the first count value is decremented in response to the control signal being a second logic state; and

    a pump stage having a variable capacitor, the variable capacitor having a control input coupled to the output of the first counter for receiving the first count value, wherein a capacitance value of the variable capacitor is changed in response to the first count value changing, and wherein the capacitance value is for determining a ramp-up rate of an output voltage at an output of the charge pump.

View all claims
  • 21 Assignments
Timeline View
Assignment View
    ×
    ×