Abstract: An electronic contact lens. In some embodiments, the electronic contact lens includes a radio antenna and radio receiver contained within the contact lens, the receiver comprising antenna impedance matching and in-phase and quadrature signal generation such that signals from the antenna are projected into in-phase and quadrature components before mixing with a local oscillator signal in the receiver. The electronic contact lens may further include electronic circuits contained within the contact lens, the electronic circuits receiving data from the radio receiver.

Abstract: An electronic contact lens. In some embodiments, the electronic contact lens includes a radio antenna and radio receiver contained within the contact lens, the receiver comprising antenna impedance matching and in-phase and quadrature signal generation such that signals from the antenna are projected into in-phase and quadrature components before mixing with a local oscillator signal in the receiver. The electronic contact lens may further include electronic circuits contained within the contact lens, the electronic circuits receiving data from the radio receiver.

Abstract: Embodiments of the disclosure relate to a low-power, high-data-rate, radio transceiver inside a contact lens. The radio transceiver includes a phase-locked loop having a frequency acquisition loop that turns on and off based on various performance characteristics of the transceiver. The transceiver also includes wireless power harvesting circuitry that receives a wireless power signal and generates a reference signal that is used by an oscillator within the transceiver.

Abstract: Embodiments of the disclosure relate to a low-power, high-data-rate, radio transceiver inside a contact lens. The radio transceiver includes a phase-locked loop having a frequency acquisition loop that turns on and off based on various performance characteristics of the transceiver. The transceiver also includes wireless power harvesting circuitry that receives a wireless power signal and generates a reference signal that is used by an oscillator within the transceiver.

Abstract: Systems, devices, and techniques for performing peak detection are described. A described receiver includes a first amplifier to amplify an input signal to generate a first amplified signal; a mixer to downconvert the first amplified signal to generate a downconverted signal; a second amplifier to amplify the downconverted signal to generate a second amplified signal; a filter, being selectably engageable by the receiver, a peak detector configured to perform voltage measurements of the second amplified signal; and switch circuitry. The switch circuitry is configured to selectably disengage the filter during a first measurement phase during which a first voltage measurement performed by the peak detector is indicative of an output voltage swing of the first amplifier, and to selectably engage the filter during a second measurement phase during which a second voltage measurement performed by the peak detector is indicative of an output voltage swing of the second amplifier.