Kabushiki Kaisha Toshiba

Jerry C Posluszny

Timothy R Fox

A carrier rejection circuit for improving carrier rejection in a balanced modulator includes balun transformers, connected to the carrier signal port and the modulated signal port, which reduces parasitic carrier leakage by reducing the average voltages at the ports, offset adjustment circuitry, connected to the modulating signal port, which applies an adjustable offset voltage to the modulating signal to reduce in-phase parasitic carrier leakage and carrier leakage caused by offset voltage at the modulating port, and a reactance network, connected between the carrier signal port and the modulated signal port, for reducing quadrature-phase parasitic carrier leakage.

Circuit for improving carrier rejection in a balanced modulator

A communication system for transmitting data between a transmitting platform and a receiving platform moving relative to each other. A phased array antenna forms the transmitting antenna rotated on the transmitting platform and a single dipole, oriented parallel to the transmitting antenna, forms the receive antenna located on the receiving platform. The phased array antenna is split into small sections, each section comprising dipole elements and a matching network, including a feedpoint. The receive antenna is mounted close to the transmitting antenna.

Communication system for transmitting data between a transmitting

An MRI signal processing apparatus is disclosed which provides a low noise output signal for use in a multi-coil MRI system, wherein each sensing coil provides an input signal to the MRI signal processing apparatus. The apparatus includes input mixer circuitry for frequency shifting each input channel from a first frequency range to a second frequency range, controllable bandpass filter circuity connected to the input mixer circuitry for bandpass filtering each frequency shifted input channel to remove unwanted noise from the MRI signal, output mixer circuity for frequency shifting the output of the controllable bandpass filter circuitry from the second frequency range to the first frequency range, summing circuitry for combining the outputs of the output mixer circuitry of each channel to produce the low noise output signal, mixer control circuitry for controlling the frequency shift of the input mixer circuitry and the output mixer circuitry, and filter control circuitry for controlling the bandwidth and phase shift characteristics of the controllable bandpass filter circuitry.

Multi-view coil bandpass filter array system

A communication system for transmitting data between a transmitting platform and a receiving platform, having two equal lengths of leaky coaxial cable forming the transmitting antenna which is located on the transmitting platform and the receive antenna is located on the receiving platform. The two equal lengths of leaky coaxial cable form a circle wherein one end of each of the equal lengths is a feedpoint for inputting data and the other end of each of the two equal lengths is terminated with a resistor to ground. The receive antenna is maintained a predetermined distance from the plane of the transmitting antenna.

Growing community of inventors

Stickney, IL, United States of America

Jerry C Posluszny