Channel skip memory system for radio receiver
First Claim
1. Channel skip memory system for use in a radio receiver and connected in said receiver between a squelch control and an oscillator comprising(a) manual-scan means having a manual mode of operation and a scan mode of operation;
- (b) clock means connected to said manual-scan means;
(c) means connecting said clock means to said squelch control of said radio receiver;
(d) counter means connected to said clock means and having a plurality of outputs, each of said outputs corresponding to an individual channel of a predetermined frequency;
(e) plurality of first logic means having two inputs, one of said inputs of each of said first logic means connected to each of said plurality of outputs of said counter;
(f) channel skipping means connected to the other of said inputs of each of said first logic means;
(g) plurality of memory means having two inputs, one of said inputs of each of said memory means connected to each output of said plurality of first logic means;
(h) reset means connected between said manual-scan means and the other of said inputs of each of said memory means;
(i) plurality of second logic means having two inputs, one of said inputs of each of said second logic means connected to the output of said memory means and the other of said inputs of each of said plurality of second logic means connected to each respective output of said plurality of outputs of said counter;
(j) plurality of diodes connected to each of the outputs of said plurality of second logic means, and;
(k) plurality of crystals of predetermined frequencies, one crystal per channel connected between each of said plurality of diodes and said oscillator whereby said clock means drives said counter to cyclically scan and receive seriatim each of said channels in regular sequence and a voltage differential received by said connecting means stops said clock means to receive the radio frequency signal on a particular channel scanned and whereby actuating said channel skipping means while receiving a signal on one of said plurality of channels generates a short pulse to reset said memory means for the particular channel being received so that the channel is skipped on subsequent scanning cycles.
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Accused Products
Abstract
A channel skip memory system for radio receiver having a single channel skipping switch to inhibit the radio receiver from receiving any of selected channels of a plurality of channels of predetermined frequencies while scanning repetitively those channels selected to be received. The channel skipping switch is utilized to skip, inhibit, bypass, look around, etc., any channel of a plurality of channels a listener does not wish to receive when the channel skip memory system connected between the squelch control and the oscillator of the radio receiver has stopped on a channel while scanning in the scan mode or has been stepped to a particular channel by the channel stepping switch in the manual mode by actuating the switch. If the channel skipping switch is actuated a second time when utilizing resettable memory elements on an inhibited channel in the manual mode, the channel is enabled. The channel stepping switch is not functional during the scanning mode. A received channel may be skipped in the scanning mode on the next scanning cycle by actuating the channel skipping switch while that channel is receiving a signal. In the manual mode of operation, each channel is skipped by actuating the channel skipping switch setting a memory for each channel to be skipped. When going from the manual mode to scan mode, the memory having been set determines those channels to be received and those channels to be skipped.
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Citations
29 Claims
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1. Channel skip memory system for use in a radio receiver and connected in said receiver between a squelch control and an oscillator comprising
(a) manual-scan means having a manual mode of operation and a scan mode of operation; -
(b) clock means connected to said manual-scan means; (c) means connecting said clock means to said squelch control of said radio receiver; (d) counter means connected to said clock means and having a plurality of outputs, each of said outputs corresponding to an individual channel of a predetermined frequency; (e) plurality of first logic means having two inputs, one of said inputs of each of said first logic means connected to each of said plurality of outputs of said counter; (f) channel skipping means connected to the other of said inputs of each of said first logic means; (g) plurality of memory means having two inputs, one of said inputs of each of said memory means connected to each output of said plurality of first logic means; (h) reset means connected between said manual-scan means and the other of said inputs of each of said memory means; (i) plurality of second logic means having two inputs, one of said inputs of each of said second logic means connected to the output of said memory means and the other of said inputs of each of said plurality of second logic means connected to each respective output of said plurality of outputs of said counter; (j) plurality of diodes connected to each of the outputs of said plurality of second logic means, and; (k) plurality of crystals of predetermined frequencies, one crystal per channel connected between each of said plurality of diodes and said oscillator whereby said clock means drives said counter to cyclically scan and receive seriatim each of said channels in regular sequence and a voltage differential received by said connecting means stops said clock means to receive the radio frequency signal on a particular channel scanned and whereby actuating said channel skipping means while receiving a signal on one of said plurality of channels generates a short pulse to reset said memory means for the particular channel being received so that the channel is skipped on subsequent scanning cycles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification