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Title:
WAVEFORM FORMING CIRCUIT
Document Type and Number:
Japanese Patent JPH06125249
Kind Code:
A
Abstract:

PURPOSE: To provide a waveform forming circuit which can output a signal of an optional waveform (sine wave, triangular wave, trapezoidal wave, etc.) and an optional frequency.

CONSTITUTION: A storage means 121 stores the information on the waveforms, and a digital value control means controls a D/A converter 124 based on the waveform information stored in the means 121. Then the digital value of an increment/ decrement circuit 123 which constructs the digital value control means is updated or maintained as it is. Then an optional waveform can be obtained by describing the waveform information into the means 121.


Inventors:
KAWAMURA MASANOBU
KIDA HIROYUKI
KAMATA SEIJI
TOJO TOSHIYUKI
OKUBO TAKESHI
MATSUURA HIROYUKI
YASHIKI NAOKI
SHIBAZAKI NOBUO
Application Number:
JP1993000140700
Publication Date:
May 06, 1994
Filing Date:
June 11, 1993
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
H03B28/00; G06F1/035; H03K3/78; H03K4/02; H03K4/92; H04L29/10; (IPC1-7): H03K3/78; H03B28/00; H04L29/10
Attorney, Agent or Firm:
大日方 富雄