ApplicationNo. 584391 filed on 06/06/1975
US Classes:340/384.72, Plural generators273/454, Electric273/460, Electric327/101, Converting input current or voltage to output frequency327/105, Synthesizer327/126, Generating staircase output331/78, ELECTRICAL NOISE OR RANDOM WAVE GENERATOR340/323R, Game reporting463/35, Audible84/671Electric analog oscillators
ExaminersPrimary: Caldwell, Sr., John W.
Assistant: Wannisky, William M.
International ClassH03D 3/00 (20060101)
AbstractThe disclosed circuit provides a signal generator which is particularly adapted for use as an audible "kilo-sonic" game device in which a plurality of switches are provided so that the different combinations of switch positions produce a corresponding number of different sounds. The circuit includes a voltage-controlled-oscillator (VCO) having an output coupled to a transducer such as a speaker. The VCO is modulated in accordance with a control signal, provided by an up-down staircase generator which is responsive to a pulse generator, to vary the frequency of its output signal. The output of the pulse generator is also selectively coupled with the output of the staircase generator. Time-constant circuits in each of the generators are respectively under the control of selected ones of the switches; and two basic modes of operation are provided by the selected switches so that the control signal at the VCO input is either a pseudo random signal, or a synchronized sub-multiple signal wherein the frequency of the staircase generator output signal is a sub-multiple of the pulse generator output signal. Accordingly, the number of different output sounds provided by the disclosed circuit is geometrically proportional to the number of switches provided.