Patent ID: 7242228
Filing Date: 2007-07-10
Classification: H03K,H03L

Abstract:
1. A method for generating an output signal having a predetermined phase shift with respect to an input signal using closed loop control, the method comprising: logically combining the input signal and the output signal of the closed loop control in accordance with first combinatory logic to generate a first control signal; logically combining the input signal and the output signal of the closed loop control in accordance with second combinatory logic to generate a second control signal; activating a first electrical energy source in accordance with the first control signal; activating a second electrical energy source in accordance with the second control signal; operating the closed loop control with electrical energy corresponding to a combination of energy supplied by the first and second electrical energy sources to generate the output signal; wherein the first electrical energy source is a first current source and the second electrical energy source is a second current source; the first combinatory logic generates the first control signal with a first logical level to activate the first current source and with a second logical level to deactivate the first current source; the second combinatory logic generates the second control signal with a first logical level to activate the second current source and with a second logical level to deactivate the second current source; and the first and second combinatory logic and the first and second current sources are selected such that I