Pulse generator circuit and communication apparatus

1. A pulse generator circuit that outputs pulses having a predetermined shape from an output terminal based on a start signal, the pulse generator circuit comprising:

a timing generator circuit that generates (n+1) signals (n is an integer greater than or equal to 2), the phases of which sequentially change at predetermined time intervals from the point when the phase of the start signal changes;

first and second power supplies that supply predetermined potentials;

n impedance devices, having device values that are determined based on sampled values of the envelope of the pulses to be outputted; and

a switching circuit that alternately connects the output terminal to the first or second power supply in a predetermined order according to the value of a logic function based on the (n+1) signals via the corresponding impedance device.

2. The pulse generator circuit according to claim 1 ,

wherein the impedance devices and the switching circuit are comprised of switching devices, each of which having an impedance when the switching device conducts current in a predetermined manner.

3. The pulse generator circuit according to claim 1 , wherein the timing generator circuit includes delay circuits connected in tandem, each of the delay circuits generating a predetermined amount of delay.

4. A communication apparatus comprising the pulse generator circuit according to claim 1 .