Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
  • H04N1/40—Picture signal circuits
  • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original
• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06G—ANALOGUE COMPUTERS
  • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
  • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor
  • G06G7/25—Arrangements for performing computing operations, e.g. operational amplifiers specially adapted therefor for discontinuous functions, e.g. backlash, dead zone, limiting absolute value or peak value
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03K—PULSE TECHNIQUE
  • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
  • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
  • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
  • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
  • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
  • H03K3/286—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable
  • H03K3/2893—Bistables with hysteresis, e.g. Schmitt trigger

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Mathematical Physics (AREA)
• Theoretical Computer Science (AREA)
• Power Engineering (AREA)
• Software Systems (AREA)
• Computer Hardware Design (AREA)
• General Physics & Mathematics (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Facsimile Image Signal Circuits (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=25515694

Family Applications (1)

Country Status (3)

Families Citing this family (5)

Family Cites Families (6)

• 1978
  • 1978-12-14 US US05/969,581 patent/US4227218A/en not_active Expired - Lifetime
• 1979
  • 1979-12-13 CA CA341,892A patent/CA1133631A/en not_active Expired
  • 1979-12-13 JP JP16091379A patent/JPS5583371A/ja active Pending

Also Published As

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