Abstract:
A receiver/controller unit (14) of a remote convenience system (10) receives an electromagnetic signal (18). The signal (18) is comprised of a plurality of pulses that convey a remote convenience function request. In response to the receipt of the signal (18), the receiver/controller unit (14) causes performance of the requested function. The receiver/controller unit (14) has a comparator (82). A first input of the comparator (82) is connected to receive an electrical signal (78) with an electrical characteristic that varies to convey the remote convenience function request. A second input of the comparator (82) is connected to receive a signal 86 that has a threshold electrical characteristic value. Preferably, the electrical characteristic is voltage amplitude. An output of the comparator (82) provides a signal indicative of the occurrence of the electrical characteristic of the electrical signal (78) exceeding the threshold value, and that conveys the remote convenience function request. A microprocessor (100) adjusts the threshold electrical characteristic value.
Abstract:
An apparatus (10) and a method for detecting an intrusion into an area (e.g., 14) are provided. The apparatus (10) has a transmitter (30) for transmitting a signal within the area. The apparatus (10) also has a receiver (32) for receiving reflected return signals of the transmitted signal and for generating an output signal indicative of the reflected return signals received. The apparatus (10) also includes a controller (36) for analyzing the output signal. The controller includes a processor (43) for running an algorithm that simulates performance of a capacitor, which charges and discharges in response to an output signal, by increasing a virtual capacitor value when the output signal is greater than a threshold and by decreasing the virtual capacitor value when the output signal is less than the threshold.