JPS575456A - Voltage switching device - Google Patents

Voltage switching device

Info

Publication number
JPS575456A
JPS575456A JP8057580A JP8057580A JPS575456A JP S575456 A JPS575456 A JP S575456A JP 8057580 A JP8057580 A JP 8057580A JP 8057580 A JP8057580 A JP 8057580A JP S575456 A JPS575456 A JP S575456A
Authority
JP
Japan
Prior art keywords
resistor
vcc
trs
resistors
emitter
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
JP8057580A
Other languages
Japanese (ja)
Inventor
Hideo Yoshimune
Tetsuo Kuchiki
Shizuo Inohara
Hirosuke Yamamoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP8057580A priority Critical patent/JPS575456A/en
Publication of JPS575456A publication Critical patent/JPS575456A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To obtain DC voltages corresponding to four states of 2-bit, by giving 4 types of voltages to one input pin, comparing each voltage a comparator and detecting four modes. CONSTITUTION:A signal of high level ''1'' or low level ''0'' is inputted to input terminals A, B as modes listed in Table. The emitter of the 1st transistor TR1 is grounded (the 2nd reference potential point) via the 1st resistor 4 (R1), the emitter of the 2nd TR2 is grounded via the 2nd resistor 5 (R2), and the 3rd resistor 6 (R3) and the 4th resistor (R4) are connected in series between the emitters of both the TRs 1, 2. A power supply Vcc (the 1st reference potential point) is applied to the collector of both the TRs 1, 2, and an output terminal 3 is provided at the connection between the resistors 6 and 7. Thus, 4 types of potentials between 0-Vcc, including 0 and Vcc themselves, can be set arbitrarily by suitably setting the output voltage through the resistors 4-7.
JP8057580A 1980-06-13 1980-06-13 Voltage switching device Pending JPS575456A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8057580A JPS575456A (en) 1980-06-13 1980-06-13 Voltage switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8057580A JPS575456A (en) 1980-06-13 1980-06-13 Voltage switching device

Publications (1)

Publication Number Publication Date
JPS575456A true JPS575456A (en) 1982-01-12

Family

ID=13722130

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8057580A Pending JPS575456A (en) 1980-06-13 1980-06-13 Voltage switching device

Country Status (1)

Country Link
JP (1) JPS575456A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4932576A (en) * 1972-07-22 1974-03-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4932576A (en) * 1972-07-22 1974-03-25

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