An antenna detection and diagnostic system and associated method,
including current and voltage detection circuits, are disclosed for
detecting antenna failure mechanisms for integrated radio receivers.
Integrated current limit detection circuitry is disclosed that determines
current levels drawn by a remotely mounted antenna and generates a drive
signal that controls a current limiting pass transistor such that current
flow through the transistor is reduced when the detected current level
drawn antenna rises above a current limit level. Integrated current and
voltage detection circuitry is disclosed that detects current and voltage
levels drawn by a remotely mounted antenna and determines under-current,
over-current, and over-voltage antenna error conditions. At least one
antenna error output pin for the integrated radio receiver is then used
provide an output signal indicative of antenna error conditions.