Ultrasonic imaging using thin film transistor backplane

A system comprising:

• an imaging structure comprising:
• a substrate,
• a receiver array having a plurality of receiver elements deposited on the substrate to detect in-phase and quadrature components of a received signal corresponding to a transmit signal, each of the receiver elements including a receiver transducer and a thin-film transistor (TFT) receiver circuit, the TFT receiver circuit comprising a quadrature detector having a mixer to mix the received signal with a reference signal in a composite bias signal that is distributed across the plurality of receiver elements, and
• a transmitter acoustically coupled to the plurality of receiver elements to generate the transmit signal through an imaging medium;
• and
• a processing circuit coupled to the imaging structure to process the detected in-phase and quadrature signals to form a focused image.