A multi-chip module is provided including a multiplier configured to multiply a frequency of an input signal into a predetermined Ka-band frequency center channel, a modulator configured to modulate the center channel, and an amplifier configured to amplify a modulated signal for output.

A multi-chip module is provided including a multiplier configured to multiply a frequency of an input signal into a predetermined Ka-band frequency center channel, a modulator configured to modulate the center channel, and an amplifier configured to amplify a modulated signal for output.

A capacitive sensing system operates according to a method which uses an ADC. The analog signal to be digitized is modulated with a triangular or saw-tooth modulating signal, so that a modulated analog signal is obtained, which is sampled with the ADC. The triangular or saw-tooth signal is chosen to have a peak-to-peak amplitude corresponding at least approximately to an integer multiple L, with L≥1, of the quantization step size of the ADC. The saw-tooth or triangular signal has a number M, of periods per each sequence of N samples. M and N are chosen such that M>1 and M≠N and such that R=r*N/(k*gcd(N, M)*L), where gcd(M, N) is the greatest common divisor of N and M and where k=2 if the modulating signal is a saw-tooth signal and k=4 if the modulating signal is a triangular signal.

A capacitive sensing system operates according to a method which uses an ADC. The analog signal to be digitized is modulated with a triangular or saw-tooth modulating signal, so that a modulated analog signal is obtained, which is sampled with the ADC. The triangular or saw-tooth signal is chosen to have a peak-to-peak amplitude corresponding at least approximately to an integer multiple L, with L≥1, of the quantization step size of the ADC. The saw-tooth or triangular signal has a number M, of periods per each sequence of N samples. M and N are chosen such that M>1 and M≠N and such that R=r*N/(k*gcd(N, M)*L), where gcd(M, N) is the greatest common divisor of N and M and where k=2 if the modulating signal is a saw-tooth signal and k=4 if the modulating signal is a triangular signal.

Techniques for mixing, or modulating, a high-frequency, digital communication signal with a low-frequency, analog current loop signal are provided. In certain examples, the techniques allow mixing the signals in a non-AC coupled manner. In certain examples, such mixing techniques can allow for simplified connections between a modem chip and an analog current loop interface chip of an analog I/O module.

Techniques for mixing, or modulating, a high-frequency, digital communication signal with a low-frequency, analog current loop signal are provided. In certain examples, the techniques allow mixing the signals in a non-AC coupled manner. In certain examples, such mixing techniques can allow for simplified connections between a modem chip and an analog current loop interface chip of an analog I/O module.

A signal generator generates an electrical signal that is sent to an amplifier, which increases the power of the signal using power from a power source. The amplified signal is fed to a sender transducer to generate ultrasonic waves that can be focused and sent to a receiver. The receiver transducer converts the ultrasonic waves back into electrical energy and stores it in an energy storage device, such as a battery, or uses the electrical energy to power a device. In this way, a device can be remotely charged or powered without having to be tethered to an electrical outlet.

A signal generator generates an electrical signal that is sent to an amplifier, which increases the power of the signal using power from a power source. The amplified signal is fed to a sender transducer to generate ultrasonic waves that can be focused and sent to a receiver. The receiver transducer converts the ultrasonic waves back into electrical energy and stores it in an energy storage device, such as a battery, or uses the electrical energy to power a device. In this way, a device can be remotely charged or powered without having to be tethered to an electrical outlet.

To realize a compact device that detects phase or controls phase or an amplitude with high sensitivity, a signal controller includes: a linear conductor having a first end fixed to a negative electrode and a second end serving as a free end; a positive electrode facing the free end with a small gap therebetween; a first signal source that applies a voltage between the negative electrode and the positive electrode, the voltage applied being variable; a driving electrode that applies an electric field to a space around the conductor, the electric field having a component perpendicular to the lengthwise direction of the conductor; and a second signal source that applies an AC signal to the driving electrode. The signal processor can be a device for controlling or modulating phase or amplitude.

A signal generator generates an electrical signal that is sent to an amplifier, which increases the power of the signal using power from a power source. The amplified signal is fed to a sender transducer to generate ultrasonic waves that can be focused and sent to a receiver. The receiver transducer converts the ultrasonic waves back into electrical energy and stores it in an energy storage device, such as a battery, or uses the electrical energy to power a device. In this way, a device can be remotely charged or powered without having to be tethered to an electrical outlet.