Multiple analyses of the first published D2P patent ( D2P Patent 7,184,723) finds that neither novelty nor feasibility was demonstrated.

Failure to clearly communicate the benefits of D2D and D2P

The latest version of the ParkerVision story is D2P (Direct2Power). It claims to be an RF power amplifer/transmitter technology that is significantly more power efficient than existing PAs. D2P was announced on January 20, 2005 (Breakthrough at ParkerVision Enables Common Silicon Semiconductors to Create Ultra-Efficient RF Power Amplifiers).

ParkerVision believes that its ESP technology represents a completely new electronic circuit architecture that has the capability of replacing RF Heterodyne architectures, which allow “for a single-step direct conversion of an incoming RF carrier signal directly to its baseband data, eliminating the need for the RF heterodyne architecture” in RF receiver and transmitter design.

ParkerVision is engaged in the development of Direct2Data (D2D) and Direct2Power (D2P) technology, based on a platform called Energy Signal Processing (ESP).