Patent ID: 6373340
Filing Date: 2002-04-16
Classification: H03F

Abstract:
A power amplifier receiving electrical energy from a primary source of electrical energy having a Vss source voltage and a Vdd source voltage, the power amplifier receiving a first input signal via a first input terminal and supplying a power output signal via load terminals, the power amplifier comprising a control logic unit having a control input and control outputs, and a network of switched capacitors containing at least one capacitor for storing electrical energy, each of said at least one capacitor having a voltage thereon, wherein said network of switched capacitors is operative to configuring electrical circuits between the load terminals, and wherein said electrical circuits include at least one member selected from a group containing:(a) the Vss source voltage; (b) the Vdd source voltage; and (c) a non-negative number of capacitors of said network of switched capacitors; and said control logic unit is operative to controlling said network of switched capacitors, wherein said control logic unit is responsive to a selection algorithm and is furthermore responsive to at least one signal taken from a group containing:(d) said control input; (e) the Vss source voltage; (f) the Vdd source voltage; (g) an estimate of the Vss source voltage; (h) an estimate of the Vdd source voltage; (i) a voltage on said at least one capacitor; and (j) an estimate of a voltage on said at least one capacitor, and wherein said control logic unit is operative to creating a voltage difference at the load terminals.