An extremely compact, full featured portable radio architecture conserves power by allowing a processor to sleep except when it needs to perform tasks A lower power processor which acts principally as an interrupt controller but which performs other functions as well (eg, tone decode, synthesizer lock monitoring, etc) so the main processor can sleep as much as possible and yet is assured of being awoken promptly when its processing power is required The resulting portable radio has extremely low power consumption (eg, on the order of 75 milliamperes during trunked mode operation)--thereby permitting even a relatively small battery pack to provide nearly 8 hours of continuous operation The portable radio with battery is small and lightweight enough to fit into a front shirt pocket

Low power architecture for portable and mobile two-way radios

A power saving arrangement for use in a handset unit which communicates with a base unit in response to the detection of an ID signal leading data signal, which are produced from the base unit, includes a processing circuit for receiving and processing the ID signal and data signal, and a detecting circuit, connected to the processing circuit, for detecting the ID signal and data signal. A CPU controls the power supply such that, under the first standby mode a reduced power is supplied to the processing circuit, and no power to the detecting circuit. Under the second standby mode as established when the detected level of the received signal exceeds a predetermined level, the reduced power is supplied to the processing circuit means and also to the detecting circuit means. Under the use mode as established when the detected ID signal has a predetermined pattern, full power is supplied to the processing circuit and also to the detecting circuit.

Power saving arrangement and power saving method

A radio telephone system has a radio telephone set (13) which has a receiving circuit the power of which is turned on or off in predetermined cycles, a radio connector (12) transmits an ID number of the radio zone (Zn) where it exists for a longer period than the period of turning on or off the power supply of the receiving circuit of the radio telephone set (13) in predetermined cycles, the radio telephone set (13) compares the ID number of the radio zone received with that stored in a memory (138c), and when the ID numbers fail to coincide with each other, the ID number of the radio telephone set (13) and the ID number of the radio zone (Zn) received are transmitted as a position entry signal to a radio channel control unit (11) through the radio connector (12), and the radio channel control unit (11) being adapted to register the ID number of the radio telephone set (13) and that of the radio zone.

Radio telephone system

A portable radiotelephone (101) operating in a radio communication system (100), the portable radiotelephone including power consumption controller circuitry (200). The radiotelephone system (100) is designed such that the portable radiotelephone (101) needs to only intermittently receive paging information from a remote transceiver (103) during a control mode. The power consumption controller circuitry (200) utilizes a low cost, low power, low frequency oscillator (237) in conjunction with hardware and software for shutting down a portion of the radiotelephone (101) for a sleep period, when the radiotelephone (101) is not receiving information from the remote transceiver (103). The current sleep period is adapted depending upon the timing accuracy of the previous sleep period.

Adaptive radio receiver controller method and apparatus

Recepteur (100) utilise pour recueillir des signaux de modulation modules sur un signal porteur. Receiver (100) used to collect modulation signals modulated on a carrier signal. Le recepteur (100) comprend un detecteur (204) et un decodeur (206) pour detecter la presence d'un signal de blocage code non valide et pour decoder un tel signal dans le signal de modulation recueilli. The receiver (100) comprises a detector (204) and a decoder (206) for detecting the presence of a non-valid coded squelch signal and decoding such signal in the recovered modulation signal. Le recepteur (100) comporte en outre un synchroniseur (208) pour synchroniser le signal code non valide qui est detecte. The receiver (100) further comprises a synchronizer (208) for synchronizing the invalid code signal detected. Le recepteur (100) est mis en mode economiseur de batterie quand un signal de blocage code non valide est detecte. The receiver (100) is in power saver mode when a non-validated coded squelch signal is detected. Le mode economiseur de batterie consiste a examiner le signal de modulation recueilli pour detecter un changement dans le signal de blocage code non valide. The battery saver mode is to examine the modulation signal collected to detect a change in the non-validated coded squelch signal. Le mode economiseur de batterie est abandonne quand un changement dans le signal de blocage code non valide est detecte. The battery saver mode is abandoned when a change in the non-validated coded squelch signal is detected.

Receiver with battery saver.

In a circuit arrangement comprising a power source circuit (12) and a phase detector (22), a phase difference signal (PD) is supplied to a first switch (31) repeatedly turned on and off during battery saving operation and to a second switch (32) initially turned on simultaneously with the first switch. First and second intermediate signals are sent through first and second low-pass filters (41, 42; 43, 44) as first and second modified signals (MO, and M0 2 ), respective-' ly, to a voltage-controlled oscillator (25). A bidirectional nonlinear circuit (36, 37) becomes conductive and also sends the second modified signal to the voltage-controlled oscillator when the first intermediate signal becomes high. The voltage-controlled oscillator produces an oscillation signal with a high sensitivity on supply of both the first and the second modified signals and with a low sensitivity on sole supply of the first modified signal. Such different sensitivities serve to make the circuit arrangement rapidly and stably carry out the battery saving operation.

Circuit arrangement comprising a voltage-controlled oscillator operable with different sensitivities

PURPOSE:To attain stabilized radio equipment by turning on/off a power supply while an oscillated frequency of a voltage controlled oscillator of the radio equipment using a synthesizer is kept. CONSTITUTION:When an input signal from an antenna 1 is demodulated in a receiver 2 and a desired input signal is inputted to the antenna 1 in a squelch circuit 4, a signal stopping the battery saving is transmitted to a control section 5. A power voltage is impressed from a terminal 10 to a voltage controlled oscillator 31 and the control section 5 only and the oscillating frequency of the oscillator 31 is kept by discharging the charge stored in capacitors 36a, 36b.

Babano Sotoaki

Papers

Circuit arrangement comprising a voltage-controlled oscillator operable with different sensitivities

Battery saving device of radio equipment

Receiver battery saver