Patent ID: 8294465
Filing Date: 2012-10-23
Classification: H03F

Abstract:
1. An apparatus, comprising: an out-of-phase signal generator to generate first and second out-of-phase RF signals; and first and second switched voltage-mode class-D (VMCD) amplifiers electrically coupled to the out-of-phase signal generator, the first VMCD amplifier to amplify the first out-of-phase RF signal and the second VMCD amplifier to amplify the second out-of-phase RF signal, the first and second VMCD amplifiers connected to one another in a push-pull configuration; where the first VMCD amplifier produces an amplified first out-of-phase signal configured to drive a first current-mode class-D (CMCD) amplifier field effect transistor (FET), and where the second VMCD amplifier produces an amplified second out-of-phase signal configured to drive a second CMCD amplifier FET, the first and second CMCD amplifier FETs being connected by a coil including an LC (inductance-capacitance) leg to define an on-coil CMCD amplifier that controls production of an output analog radio frequency (RF) signal by a transmit coil associated with parallel magnetic resonance imaging (MRI) transmission.