JPS55135969A - Character read device - Google Patents

Character read device

Info

Publication number
JPS55135969A
JPS55135969A JP4392079A JP4392079A JPS55135969A JP S55135969 A JPS55135969 A JP S55135969A JP 4392079 A JP4392079 A JP 4392079A JP 4392079 A JP4392079 A JP 4392079A JP S55135969 A JPS55135969 A JP S55135969A
Authority
JP
Japan
Prior art keywords
output
power supply
circuit
register
pulse
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
Application number
JP4392079A
Other languages
Japanese (ja)
Inventor
Tsuneo Hirose
Motonobu Fukushi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4392079A priority Critical patent/JPS55135969A/en
Publication of JPS55135969A publication Critical patent/JPS55135969A/en
Pending legal-status Critical Current

Links

Landscapes

  • Character Input (AREA)

Abstract

PURPOSE: To make it possible to read a character at a proper position at all times, by calculating with high accuracy the difference between the frequency of commercial input power supply and the reference frequency, and correcting the timing of the read control signal depending on the above difference.
CONSTITUTION: The commercial power supply AC is applied to not only the motor 8 but also the waveform conversion circuit 1 in order to generate a square wave at the output side of the circuit 1, the square wave is provided to a monostable multivibrator 2 in order to generate a pulse signal in the output of the multivibrator 2, and this pulse signal is provided to both the delay circuit 3 and the register 6. The pulse signal which has been passed through the circuit 3 is used for resetting the counter 5, to this counter is provided an output of the oscillator 4 which generates a pulse of frequency higher than that of the power supply AC, and the logical value corresponding to variation of the power supply AC is output to the outputs 20W25. These outputs 20W25 are provided to the register 6, are set by the pulse of the multivibrator 2, the output of the register 6 is provided to the micro-processor 7, compared with the reference value which has been set in advance by the program instruction, and the timing of the read control circuit 9 is corrected depending upon the comparison result.
COPYRIGHT: (C)1980,JPO&Japio
JP4392079A 1979-04-11 1979-04-11 Character read device Pending JPS55135969A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4392079A JPS55135969A (en) 1979-04-11 1979-04-11 Character read device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4392079A JPS55135969A (en) 1979-04-11 1979-04-11 Character read device

Publications (1)

Publication Number Publication Date
JPS55135969A true JPS55135969A (en) 1980-10-23

Family

ID=12677141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4392079A Pending JPS55135969A (en) 1979-04-11 1979-04-11 Character read device

Country Status (1)

Country Link
JP (1) JPS55135969A (en)

Similar Documents

Publication Publication Date Title
JPS549563A (en) A-d converter
JPS5426546A (en) High frequency wave heating device power control method
JPS55135969A (en) Character read device
JPS52471A (en) System for measuring oscillation frequencies of magnetron used in elec tronic cooking range
JPS57151888A (en) Time measuring device
JPS5441060A (en) Multivibrator
JPS5438522A (en) Pulse width modulating inverter
JPS5373324A (en) Controlling device of pulse width controller inverters
JPS5647843A (en) Variable clock frequency computer
JPS5493955A (en) Ignition pulse phase control method
JPS5446411A (en) Pulse generating circuit
JPS55676A (en) Pulse delay circuit
JPS551703A (en) Programmable pulse generator
JPS5373047A (en) Generation circuit for timing signal
JPS5780261A (en) Trigger circuit
JPS5644284A (en) Speed error detector
JPS53100753A (en) Generator circuit for triangular wave
JPS5587986A (en) Electronic watch system
JPS5286758A (en) High accurate digital delay circuit
JPS5762770A (en) Phase angle control circuit of thyristor converter
JPS5478043A (en) Function generator
JPS5435664A (en) Delay pulse signal generation circuit
JPS52135038A (en) Automatic speed-matching apparatus
JPS5288730A (en) Inverter control circuit
JPS54122081A (en) Integrated circuit for generating timing signal