JP2008245257A5 - - Google Patents

Claims (8)

A template pulse generation circuit for generating a template pulse used for detection of a received pulse in pulse communication,
The template pulse is generated in any one of a continuous output mode in which the template pulse is continuously output according to the supplied control signal and an intermittent output mode in which the template pulse is intermittently output. A template pulse generation circuit comprising an output mode switching circuit for switching an output mode. A continuous pulse generating circuit for continuously generating the template pulse;
An intermittent pulse generation circuit for intermittently generating the template pulse,
2. The template pulse according to claim 1, wherein the output mode switching circuit switches the output mode by selecting an output of one of the continuous pulse generation circuit and the intermittent pulse generation circuit. Generation circuit. A mode variable pulse generating circuit for generating the template pulse continuously or intermittently according to an oscillation mode switching signal supplied to a mode control signal input terminal;
The template pulse generation circuit according to claim 1, wherein the output mode switching circuit supplies the oscillation mode switching signal to the mode control signal input terminal of the mode variable pulse generation circuit. The mode variable pulse generation circuit includes a multi-stage inverter circuit unit configured to include a cascade connection of a plurality of inverters, and a plurality of switching elements whose opening / closing is controlled by the output of the inverter of the multi-stage inverter circuit unit, Intermittent higher frequency than the clock pulse signal supplied to the input terminal of the first-stage inverter among the inverters by connecting a predetermined output terminal to the positive or negative side of the power supply according to the opening and closing of a plurality of switching elements And a pulse generation logic circuit part capable of generating the template pulse which is a typical pulse signal,
The multi-stage inverter circuit unit feeds back the output of the inverter at the final stage in a predetermined multi-stage part to the input terminal of the first stage of the multi-stage part according to the oscillation mode switching signal supplied to the mode control signal input terminal It is configured to switch the intermittent loop of the feedback loop circuit that forms the ring oscillation circuit by connecting the closed loop,
4. The template pulse generation circuit according to claim 3, wherein the pulse generation logic circuit unit generates the template pulse continuously or intermittently according to switching of the feedback loop circuit.   The template pulse generation circuit according to claim 4, wherein the multi-stage inverter circuit unit is configured by cascading a plurality of differential inverter circuits. A counter for counting oscillation pulses by the ring oscillation circuit;
The said output mode switching circuit is comprised so that the duration of the said template pulse in the said intermittent output mode may be prescribed | regulated according to the count value of the said counter. 2. A template pulse generation circuit according to 1.   The multi-stage inverter circuit unit opens and closes the corresponding switching element of the corresponding I-phase system pulse generation logic circuit unit according to the output of the even-numbered stage inverter, thereby causing the I-phase system pulse generation logic circuit unit to open and close The I-phase template pulse is generated from the output terminal of the Q-phase, and the corresponding switching element of the pulse generation logic circuit portion of the corresponding Q-phase system is opened / closed by the output of the odd-numbered inverter, and the Q-phase The template pulse generation circuit according to claim 6, wherein the template pulse generation circuit is configured to generate the Q-phase template pulse from an output terminal of a system pulse generation logic circuit unit.   The template pulse generation circuit according to claim 6, wherein the ring oscillation circuit is configured such that an oscillation frequency can be adjusted according to a supplied frequency control signal.