Patent ID: 6693477
Filing Date: 2004-02-17
Classification: G06F,H03K,H04B

Abstract:
A clock circuit for a mobile device, the clock circuit having a clock circuit output, comprising:a state signal having a first state and a second state, wherein the state signal is in the first state while the mobile device is transmitting; a controller coupled to the state signal, the controller being configured to generate a digital clock enabling signal when the state signal is in the first state and to generate an analog clock enabling signal when the state signal is in the second state; an analog clock circuit coupled to the controller to receive the analog clock enabling signal and configured to generate an oscillating output, wherein the oscillating output is enabled as the clock circuit output when the analog clock circuit receives the analog clock enabling signal from the controller; and a digital clock circuit coupled to the controller to receive the digital clock enabling signal and configured to generate a digital clock output having a frequency that is substantially equal to the frequency of the oscillating output, wherein the digital clock output is enabled as the clock circuit output when the digital clock circuit receives the digital clock enabling signal from the controller.