Remote control transmitter
First Claim
1. Apparatus for transmitting remote control signals having an alternating sequence of two chronologically successive frequency pulses, the first said pulse having a first, predetermined frequency and the second pulse having a second, manually-selectable frequency, the apparatus comprising:
- a plurality of manually operable command keys, each key supplying at a respective output a manually-selected command signal upon operation;
circuit means having a respective input coupled to each said key output for encoding and supplying on a plurality of outputs the received, manually-selected command signal in logic form;
circuit means for generating and supplying at resepective outputs two periodic logic pulse sequences which are the logical inverse of one another;
circuit means having a plurality of logic inputs for transmitting a signal having a frequency dependent on the logic signals supplied to said inputs;
a plurality of resistance elements;
a plurality of diodes; and
a matrix of coupling points, each said coupling point being connected by a respective resistance element to a respective encoding circuit means output, by a respective diode of predetermined polarity to one of said pulse generating circuit means outputs, and to a respective input of said transmitting circuit means,the polarity of said diodes being predetermined such that during a first portion of the period of said generating circuit means said diodes are conductive to permit a predetermined logic command signal to be supplied from said generating circuit means outputs through said coupling points to said transmitting circuit means and such that during a second portion of said period said diodes are non-conductive to permit said encoded, manually-selected command signal to be passed through said resistors and said coupling points to said transmitting circuit means.
0 Assignments
0 Petitions
Accused Products
Abstract
A remote control transmitter for transmitting remote control signals whichomprise an alternating sequence of two chronologically successive pulses having a first and a second frequency, respectively. The transmitter comprises a plurality of manually-operable command keys for supplying a command signal upon operation, an encoding circuit for supplying the command signal in logic form, a pulse generator having outputs which are the logic inverse of one another, a transmitting circuit for transmitting a signal dependent upon the logic signal supplied at its inputs, and a matrix of coupling points. Each coupling point is connected by a resistance element to a respective encoding circuit output, by a diode of predetermined polarity to a pulse generator output, and to a respective transmitting circuit input. The polarity of the diodes is such that during a first portion of the pulse generator period a predetermined logic command signal is supplied to the transmitting circuit, while during a second portion of the period the manually-selected command signal is supplied thereto.
20 Citations
11 Claims
-
1. Apparatus for transmitting remote control signals having an alternating sequence of two chronologically successive frequency pulses, the first said pulse having a first, predetermined frequency and the second pulse having a second, manually-selectable frequency, the apparatus comprising:
-
a plurality of manually operable command keys, each key supplying at a respective output a manually-selected command signal upon operation; circuit means having a respective input coupled to each said key output for encoding and supplying on a plurality of outputs the received, manually-selected command signal in logic form; circuit means for generating and supplying at resepective outputs two periodic logic pulse sequences which are the logical inverse of one another; circuit means having a plurality of logic inputs for transmitting a signal having a frequency dependent on the logic signals supplied to said inputs; a plurality of resistance elements; a plurality of diodes; and a matrix of coupling points, each said coupling point being connected by a respective resistance element to a respective encoding circuit means output, by a respective diode of predetermined polarity to one of said pulse generating circuit means outputs, and to a respective input of said transmitting circuit means, the polarity of said diodes being predetermined such that during a first portion of the period of said generating circuit means said diodes are conductive to permit a predetermined logic command signal to be supplied from said generating circuit means outputs through said coupling points to said transmitting circuit means and such that during a second portion of said period said diodes are non-conductive to permit said encoded, manually-selected command signal to be passed through said resistors and said coupling points to said transmitting circuit means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification