Panasonic Corporation

Panasonic Semiconductor Asia Pte. Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Asia Pacific Pte. Ltd.

Narciso Repollo Semira

Atsushi Kitagawa

Gorou Mori

Shiah Siew Wong

Tien Yew Kang

Chun Kiong Leslie Khoo

Wee Sien Hong

Yoshihito Kawakami

Ulysses Ramos Lopez

Jiong Fu

Muhammad S/o Abuturab

Etsuji Sato

Hong Meng Tang

Chung Kiong Leslie Khoo

Chee Kuan Leong

A plurality of batteries connected in series are monitored by a plurality of monitor devices, respectively. The monitor devices are connected in series to communicate under the daisy chain communication system. The daisy chain communication system includes a micro-control unit for producing a binary signal, a communication device for converting the binary signal to a pulsating signal. The communication device produces a special code based on an instructions from the micro-control unit. Each monitor device changes between a communication OFF state and a communication ON state. Each monitor device has a signal detector which operates during the communication OFF state and detects the special code, whereby upon detection of the special code, the signal detector generates a wakeup signal so that the monitor device is changed from the communication OFF state to communication ON state.

Wakeup sequence for two-wire daisy chain communication system

LED drivers specially directed to LED matrix driver's ghost image prevention is disclosed. The LED driver receives an external input and decodes the input to produce a time multiplex timing on turning on an LED array. The LED driver inserts a dead time to the outputs and during this time the ghost image prevention circuit discharges the output stray capacitances to a predetermined level.

LED matrix driver ghost image prevention apparatus and method

A class D amplifier with output DC offset protection is disclosed. The DC offset protection receives a PWM input signals from the outputs and investigates the PWM output signals whether there is a large DC voltage difference is being reflected on the speaker load. If so, shutdown signal SD will be sent by the DC offset protection to the PWM control logic and gate driver, thus, shutting down the output of the class D system and preventing disastrous condition from being develop across the speaker.

Output DC offset protection for class D amplifiers

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Singapore, Singapore

Narciso Repollo Semira