| 摘要 |
<p>PURPOSE: To integrate the low-frequency triangular wave generator by forming the generator of a high-frequency pulse generator, an up/down counter having a counting-direction inverting circuit, and a D/A converter. CONSTITUTION: The high-frequency pulse generator 11 is included which is supplied with an input CK of the up/down pulse counter 12 that performs binary output and outputs an (n)th bit among (n) output bits and an inverted input S/D. The S/D is controlled with an output Q of a flip-flop inverting circuit 13 having inputs R(reset) and S(set) connected to the outputs of AND ports 14 and 15. The port 14 receives an (n) output U of the counter 12 and the port 15 receives its inverted output. The (n) output U of the counter 12 is received by the D/A converter 16 which converts the succession of the counting state of the counter 12 into a voltage having a nearly triangular staircase waveform. Consequently, a desired low-frequency triangular wave is obtained by using an element which can easily be built in an integrated circuit.</p> |
