A circuit for measuring a pulse width of a remote control signal comprises a receiver for receiving a remote control signal exhibiting at least one pulse; an amplifier for shaping and amplifying the received remote control signal to produce a corresponding output signal; a counter having an output which changes from first to second logic states in response to reception of a falling edge of a first pulse of the output signal and simultaneously making a first count of clock pulses that is cleared at the falling edge of each pulse of the output signal; and a microprocessor. When the value of the first count reaches a first predetermined value equivalent to an output signal pulse period and a selected delay, the output changes back to the first logic state. The selected delay is set longer than the period of each pulse so that the first count does not reach the first predetermined value before arrival of another pulse within a waveform of the output signal. A logic gate provides the clock pulses to the counter only when the counter obtains the second logic state. The microprocessor generates the clock pulses and a second count of the clock pulses starting at the falling edge of the first pulse of the output signal, stores a value of the second count when the counter output changes back to the second logic state, and measures the remote control signal waveform width by subtracting the selected delay from the second count.

A remote control signal receiver receives a remote control signal in which bit signals are included as pulse signals. The remote control signal receiver includes a remote control signal receiving portion that receives a remote control signal, and a microcomputer. The microcomputer detects a change in a logic level of pulsed signals in the remote control signal, detects a pulse period and a pulse width of the pulse signals of the remote control signal, and determines whether there is an error in the remote control signal based on the detected pulse period and the pulse width of the pulse signals of the remote control signal. It is possible to detect an error in a remote control signal received by the remote control signal receiver.

A wireless audible indication system comprising a transmitter and a receiver. An embodiment of the transmitter includes a modulator formed by a microprocessor and a radio frequency oscillator. The modulation format employed is selectable by the user using severable jumper wires. A battery status circuit is included which verifies the status of a battery within the transmitter. The modulator transmits a low battery bit to the receiver in order to alert the user of a weak transmitter battery. An embodiment of the receiver includes a superregenerative detector which produces an intermediate signal upon receiving a radio frequency signal. A signal processing circuit, which includes an active peak detector stage and a discrete comparator stage, is used to process the intermediate signal. A microprocessor controls a sound generator circuit in response to the processed intermediate signal. The microprocessor, which normally operates in an inactive mode, is awaken using a wake-up circuit upon reception of the radio frequency signal. A battery status circuit is included to verify the status of a battery within the receiver. Embodiments of the transmitter and receiver employ a pulse position modulation scheme.

A system and method for managing a communication link between a consumer electronic device adapted for two-way, wireless communications with at least one peripheral. The communication link is managed using a controller that is associated with the consumer electronic device that functions to assign communication slots to the peripheral to facilitate communications between the peripheral and the consumer electronic device.