Ken Stone/1973 classic Serge/Serge peak and trough

Jump to navigation Jump to search

The following info on the 1973 variant of the Peak and Trough module is presented for educational/historic purposes only and are not to scale.

How it works[edit | edit source]

Functionally it is remarkably simple. Diodes form the linear equivalent of an OR gate or an AND gate. There is a 0.6V voltage loss across the diodes. This is followed by a complementary emitter follower which loses 0.6 volts in the opposite direction, thus compensating for the loss in the diodes. A constant current source acts as a pull-up or pull-down for the emitter follower. The "no inputs" base state is derived from a resistor pull-up or pull down to an appropriate voltage rail, while using another diode to clamp it to either 6 volts (trough) or 0 volts (peak). FD6666 diodes were used, though any common silicon signal diode would do. Generic general purpose silicon signal transistors can be substituted.

Construction[edit | edit source]

PCB pattern
PCB pattern and components
PCB component side

PCB connections

  • A = Peak input
  • C = Peak input
  • B = Peak input
  • D = Peak input
  • E = Peak output
  • F = Trough input
  • G = Trough input
  • H = Trough input
  • I = Trough input
  • J = Trough output
  • W = 0v
  • X = +12v
  • Y = +6v
  • Z = -12v

CC-BY-NC[edit | edit source]

Readers are permitted to construct these circuits for their own personal use only. Serge Tcherepnin retains all rights to his work.

See also[edit | edit source]

References[edit | edit source]

External links[edit | edit source]