Abstract: A control apparatus for an air conditioning system has an outdoor unit with a compressor, a condenser and a plurality of motorized valves installed to a plurality of branch pipings. A plurality of indoor units having, a plurality of indoor thermoswitches, a microcomputer, and a drive circuit for driving the motorized valves according to the output from the microcomputer are also provided for the control apparatus. The microcomputer counts the number of indoor units required for operation by receiving the output from the indoor thermoswitch. The microcomputer also controls the opening of the motorized valves by predetermined opening steps, according to the result of the counting and with reference to an opening table. The opening table relates the number of indoor units required for operation with the opening of each of the motorized valves. The control apparatus thus permits an optimum distribution of refrigerant to the indoor units to be set quickly.

Abstract: A vehicle radio telephone system includes, in addition to a handset associated with a telephone set, a wireless microphone detachable from the telephone set and a telephone receiver comprising a speaker contained in the telephone set. When a driver drives a vehicle, the wireless microphone is placed near the driver's mouth so that the driver can transmit and receive without handling the handset.

Abstract: A mobile data receiving system for a mobile communication system is disclosed. A clock signal for a digital phase synchronization loop circuit used for receiving digital data such as a dial number is obtained by multiplying or dividing the frequency of the output signal of a highly-stable oscillator for generating a reference frequency for a frequency synthesizer. Also, noise which is generated by the operation of the digital phase synchronization loop circuit is prevented from deteriorating the performance of the transmitter-receiver by the use of a matching circuit located between the frequency multiplier or divider and the digital phase synchronization loop circuit.