JPS6137641U - Diversity receiving device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram of an embodiment of the diversity receiving device of the present invention, and FIG. 2 is a specific circuit diagram of the main part of the block circuit diagram of FIG. 1. 1, 2: antenna, 3: switching circuit, 4: receiver, 9:
Detection circuit, 10: detection sensitivity adjustment circuit, 11: switching drive circuit, 12: first integration circuit, 13: second integration circuit,
14: Comparator.

Claims (1)

[Scope of utility model registration request] (1) Two antennas, a switching circuit for selecting one of the two antennas, a receiver to which the output of the one antenna selected by the switching circuit is given, and driving the switching circuit. A diversity receiving device comprising a switching drive circuit, and a detection circuit that detects a decrease in the reception level of the receiver and controls the pruning switching drive circuit,
A diversity receiving device comprising a detection sensitivity adjustment circuit that adjusts the detection sensitivity of the detection circuit according to the reception level. {2} The detection circuit includes first and second integrator circuits having different time constants to which a signal corresponding to the reception level is applied, and a comparison circuit that compares the outputs of the first and second integrator circuits. , wherein the detection sensitivity adjustment circuit is configured to adjust the bias of either one of the first and second integration circuits according to the reception level. A diversity receiving device according to claim 1.