| 摘要 |
<p>In one selection arrangement for a differentially wound ferreed network, a PNPN transistor gate is employed to select particular switches of a network grid. In the past, the gates have been serially enabled to define a pulse path. Here an individual path to ground for selection control currents is provided through a resistor connected in the cathode circuit of the transistor. Enabling of a selected transistor is made independent of a preceding or succeeding transistor in the pulse path and the integrity of said path may be advantageously verified by monitoring the magnitudes of the control and path sensing currents supplied to the selected transistors.</p> |
