A LOW POWER RADIO FREQUENCY ELECTRONIC RELAY
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2001-Nov-13
A typical circuit used to direct RF energy amongst selectable output ports implements the usage of PIN diodes. The diodes are selectively turned on/off, behaving much like switches. When arranged in a matrix, many useful switch- ing characteristics can be achieved. A major drawback of using PIN diodes, however, is that the diodes are switched on by forward biasing, requiring a current flow through the device. The intended application for this circuit is in battery operated equipment making minimal current drain very advantageous, The current consumed in the biasing of these diodes cannot be tolerated in battery powered equipment and an alternative low loss network is necessary.