Abstract: A battery powered, portable, wireless communications transceiver device (10), has a housing (11) including a first portion (12) and a second portion (14). The device has a controller and a transmitter coupled to the controller. Using a digital, time-division multiple access protocol, the transmitter transmits messages comprised of packets. The first portion and the second portion are connected by a hinge (17) allowing the device to be put into an opened position or a closed position. The device has a sensor for detecting whether the housing is in an opened or in a closed position. The controller of the device receives a signal from the sensor regarding the position of the housing. The controller is programmable to respond to the position of the housing and to advantageously spread the transmission of packets of the message over a longer period than prior art methods, when the housing is in the closed position.

Abstract: A controllable crystal oscillator includes a crystal resonator having first and second electrodes, a gain stage having first and second terminals connected to the first and second electrodes for starting and maintaining the oscillation, first and second capacitor banks connected to the first and second terminals for providing a capacitive load to the resonator, and first and second dynamic switches interconnected between the terminals and the respective capacitor banks for cycling the capacitor banks in and out of connection.