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Disclosed is a communicable SCS + CCS (Schottky Current Switch and Cascode Current Switch) circuit family. The implementation uses ground up power supplies of 1.7 and 3.4 volts.
English (United States)
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Cost Performance Logic Circuits
Disclosed is a communicable SCS + CCS (Schottky Current Switch and
Cascode Current Switch) circuit family. The implementation uses ground up
power supplies of 1.7 and 3.4 volts.
The approach allows both single-level and double-level current switch circuits
on the same circuit chip. This affords complex functions of a double-level current
switch to best advantage, e.g., latches, shift register latches, multiplexers and
complex combinatorial functions. Single-level current switch functions are used
for clock powering, gating and simple functions.
If a simple function can be performed by an SCS circuit, the function will take
less than 1/2 the power of doing the function in CCS. Similarly, complex
functions implemented in CCS have a definite power, area and delay advantage
over their SCS counterparts. This chip organization and circuit approach will
support both types of circuits intermixed in any ratio.
As depicted in the drawing, a common most positive power supply allows an
SCS to communicate directly with an upper-level CCS circuit, and vice versa (no
voltage transitions required in most communications).
The SCS or CCS circuit can talk to a lower level CCS through
transistor/SBD (Schottky barrier diode) voltage converter circuit
(note optional current source resistor).
SCS VREF equals CCS VREF upper equals +3.07 V single Reference