DIGITAL BIDIRECTIONAL BUS SWITCH
Original Publication Date: 1984-Apr-01
Included in the Prior Art Database: 2001-Oct-12
This design solves the problem of emulating an MOS bidirectional bus switch in a TTL breadboard. Bidirectional bus switches are easily realized in MOS with couplers as follows: FIGURE 1 The "boot" signal, when asserted, simply connects lines B and A allowing the one line that is driven to "drive" the undriven line. That is, when "boot" is asserted, the coupler in effect becomes a low impedance resistor.