JPS55100071A - Inverter controlling circuit for pulse width modulation - Google Patents
Inverter controlling circuit for pulse width modulationInfo
- Publication number
- JPS55100071A JPS55100071A JP485579A JP485579A JPS55100071A JP S55100071 A JPS55100071 A JP S55100071A JP 485579 A JP485579 A JP 485579A JP 485579 A JP485579 A JP 485579A JP S55100071 A JPS55100071 A JP S55100071A
- Authority
- JP
- Japan
- Prior art keywords
- reset pulse
- signal
- pulse width
- pulse
- width modulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Inverter Devices (AREA)
Abstract
PURPOSE: To increase a noise margin by a method wherein a reset pulse being set at the lower limit value of an allowable pulse width and a pulse width modulation signal obtained by taking a logical sum with the output signal of a comparator are utilized as a base driving signal of each phase.
CONSTITUTION: A voltage which changes into a linear one at the time when it occurs at a lamp circuit 1 is transformed to a square wave of a variable frequency by a square wave oscillator 2. Further, a reset pulse which determines the time and the point where a pulse height of a saw tooth wave is given, generates at the reset pulse generating circuit 3. The output of the lamp circuit 4 having an upper limiter and after comparing it with a saw tooth wave having a zero duration obtained by guiding the inverted signal of the reset pulse and the reset pulse to a saw tooth wave generating circuit 5 with a comparator, it becomes a pulse width modulation signal. This signal is guided to a logical sum circuit with the reset pulse and a base driving signal in each phase is sent therefrom.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP485579A JPS55100071A (en) | 1979-01-22 | 1979-01-22 | Inverter controlling circuit for pulse width modulation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP485579A JPS55100071A (en) | 1979-01-22 | 1979-01-22 | Inverter controlling circuit for pulse width modulation |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55100071A true JPS55100071A (en) | 1980-07-30 |
Family
ID=11595285
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP485579A Pending JPS55100071A (en) | 1979-01-22 | 1979-01-22 | Inverter controlling circuit for pulse width modulation |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55100071A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63503372A (en) * | 1986-05-20 | 1988-12-08 | エヌシーアール インターナショナル インコーポレイテッド | Printer control circuit |
-
1979
- 1979-01-22 JP JP485579A patent/JPS55100071A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63503372A (en) * | 1986-05-20 | 1988-12-08 | エヌシーアール インターナショナル インコーポレイテッド | Printer control circuit |
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