Sony Corporation

Takashi Takano

Toshihiko Masuda

Shigeru Saegusa

Susumu Morioka

Takahiro Noda

Manabu Yamanaka

A signal amplification apparatus which supplies an input signal to a signal processing section to perform signal processing on the input signal, amplifies a power supply voltage supplied from a power source section in accordance with the processed signal, and outputs the amplified power supply voltage. The apparatus includes output decrease prediction means for predicting decrease of the output signal on the basis of an amplitude of the input signal; power supply voltage correction signal generation means for generating a power supply voltage correction signal for correcting the power supply voltage of the power source section on the basis of the predicted decrease of the output signal; and feedforward control means for performing feedforward control of the power supply voltage of the power source section by using the power supply voltage correction signal.

Signal amplification apparatus and signal amplification method

A loop antenna device includes a loop antenna having a high noise resistance performance. In a loop antenna having a shield member covering a looped conductor portion formed in a loop shape from a conductive wire, a non-covered portion where the looped conductor portion is not covered is formed in correspondence with a portion of the conductive wire including a reference position for the symmetry of two terminals for connection between the antenna device and a reception circuit. This provides a balanced shield structure. Besides, a line for connecting one end of the conductive wire to the ground potential and a line for connecting the shield member to the ground potential are individually separate from each other, whereby reception of a voltage fall due to common impedance by the antenna is suppressed.

Antenna device, and method of manufacturing antenna device

An electronic device has a first signal path, a first power supply path, and a connector that transmits to an external device the input signal on which the voltage has been superposed. The device also has a first power supply switch inserted into the first power supply path and an amplitude detector that detects at the connector an amplitude of the input signal, a control section that determines, based on a detection output from the amplitude detector, which a connection condition of the external device to the connector is a first condition in which the external device is not connected to the connector or a second condition in which the external device is connected to the connector. Based on the connection condition, the control section turns on or off the first power supply switch.

Growing community of inventors

Tokyo, Japan

Takashi Takano