JPS62164434U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a basic embodiment of the charging circuit for cordless telephones of the present invention, Figure 2 is a diagram of a specific circuit that can be used as the timer circuit shown in Figure 1, and Figure 3 is Furthermore, FIG. 2 is a block diagram of a circuit that can be used as a replacement circuit for the timer circuit shown in FIG. 2, and FIG. 4 is a schematic block diagram of a conventional charging circuit for a cordless telephone. In the figure, 10 is a base unit, 12 is a power supply circuit, 13 and 14 are positive and negative output terminals, 20 is a portable unit, 21 is a rechargeable battery, 23 and 24 are positive and negative input terminals, and 30 is constructed according to the present invention. 31 is a current limiting resistor circuit, 32 is a switching means, 33 is a quick charging command switch, 34
is a timer circuit.

Claims (1)

[Scope of Utility Model Registration Claim] When a portable unit connected to the base unit via radio frequency is placed on the cradle of a base unit connected by wire to a telephone line, the positive and negative inputs provided on the portable unit By electrically contacting the terminal pair with the positive and negative output terminal pair provided on the base unit, charging current is supplied from the base unit's built-in power supply circuit to the portable unit's built-in rechargeable battery via the current limiting resistor circuit. A charging circuit for a cordless telephone; By operating a quick charge command switch, the equivalent resistance value of the current limiting resistor circuit is changed from a relatively high first resistance value to a relatively low second resistance value. A charging circuit for a cordless telephone, comprising: a circuit for reducing the rate of restriction on the charging current and relaxing the rate of restriction on the charging current.