Texas Instruments Corporation

Yonghwan Lee

Tatsuyuki Nihei

Tatsuro Sato

Yoshinori Okada

Keiichi Kajino

Manabu Nishimizu

A receiver is provided that has reduced power consumption and seldom operates erroneously. The receiver generally includes: an input circuit or photoreceptor that receives a modulated digital signal that can includes a preamble; a detector that detects the received digital signal and outputs a baseband signal; a comparator that compares baseband signal and a reference signal; an integration circuit that integrates baseband signal; hysteresis circuits that generates voltage signals based on an average value signal from integration circuit; a multiplexer that selects between the signals from the hysteresis circuits based on a digital output signal from comparator; and a pulse detection counter that counts the number of pulses of the digital signal from comparator and outputs a count signal to one of the hysteresis circuits.

Receiver

External output terminal is clamped by clamping circuit , and a current mirror is configured using diode circuit within clamping circuit and detector transistor . When the voltage of external output terminal can no longer be maintained by the first current supply circuit alone as load increases, clamping circuit shuts off, and detector transistor shuts off. As detector transistor shuts off, the second current supplying element becomes conductive and supplies a current to load . Because the second current supplying element is not operating during normal operation during which the current consumption by load is low, the current consumption is low. In addition, because no amplifier is required, only a small number of elements are required.

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Tokyo, Japan

Yonghwan Lee