Organ pedal tone generator

Claim 2

A tone generator circuit including in combination, capacitor means for developing a voltage wave, current supply means connected to said capacitor means for supplying current thereto to charge said capacitor means so that the voltage thereacross rises linearly, switch means connected to said capacitor means for discharging said capacitor means, said switch means having a control element for receiving a control potential which causes said switch means to conduct and discharge said capacitor means in response to a voltage across said capacitor means which reaches said control potential, circuit means connected to said control element of said switch means for applying a first potential to said control element which causes said switch means to conduct to discharge said capacitor means to produce a wave thereacross which has the frequency of a first musical note, and control means connected to said circuit means for causing said circuit means to establish a second potential which causes said switch means to conduct to discharge said capacitor means to produce a wave thereacross which has a frequency different from said frequency of the first musical note.

Claim 3

A tone generator circuit in accordance with claim 1 further including tuning means connected to said current supply means for causing said current supply means to supply currents of different values to charge said capacitor means at different rates, with the values of the currents supplied being related to said first potential applied to said switch means by said circuit means so that the waves across said capacitor means have the frequencies of different musical notes.

Claim 4

A tone generator circuit in accordance with claim 1 wherein said second potential produced by said circuit means is related to said first potential to produce a second musical note which is related to said first musical note as the fifth and root notes in a chord.

Claim 5

A tone generator circuit in accordance with claim 1 further including frequency divider means coupled to said switch means for producing a rectangular wave at one half the frequency of the wave developed across said capacitor means, and combining means coupled to said capacitor means and to said frequency divider means to provide a resultant wave.

Claim 6

The circuit of claim 4 further including a first keying means coupled to said combining means for keying the resultant wave produced thereby, and second keying means coupled to said capacitor means for keying the wave developed thereacross.

Claim 7

The circuit of claim 5 further including first and second gate means for controlling said first and second keying means, with each of said gate means having a first input coupled to a keyboard and a second input coupled to rhythm means.

Claim 8

The circuit of claim 1 wherein said switch means is formed by a unijunction transistor having a gate electrode, and said gate electrode forms said control element of said switch means.

Claim 9

An organ tone generator system including in combination, oscillator means for producing waves corresponding to musical notes including capacitor means across which the waves are developed, means connected to said capacitor means for applying current thereto to charge said capacitor means, and switch means connected to said capacitor means for discharging the same in response to a voltage across said capacitor means which reaches a predetermined potential, a control circuit connected to said switch means and applying a control potential to said switch means for actuating the same, said control circuit including first means for establishing a first control potential which causes said switch means to conduct to discharge said capacitor means to produce a wave thereacross which has the frequency of a first musical note, and second means coupled to said first means and causing said first means to establish a second potential which causes said switch means to conduct to discharge said capacitor means to produce a wave thereacross of a higher frequency of a second musical note, gating means coupled to said capacitor means for selectively passing the waves developed thereacross and controlling the attack and decay of the musical notes produced by said waves, and rhythm means coupled to said second means of said control circuit and to said gating means for controlling said second means and said gating means in accordance with a rhythm pattern.

Claim 10

An organ tone generator system including in combination, oscillator means for producing waves corresponding to musical notes including capacitor means across which the waves are developed, means connected to said capacitor means for applying current thereto to charge said capacitor means, and switch means connected to said capacitor means for discharging the same in response to a voltage across said capacitor means which reaches a predetermined potential, a control circuit connected to said switch means and applying a control potential to said switch means for actuating the same, said control circuit including first means for establishing a first control potential which causes said switch means to conduct to discharge said capacitor means to produce a wave thereacross which has the frequency of a first musical note, and second means coupled to said first means and causing said first means to establish a second potential which causes said switch means to conduct to discharge said capacitor means to produce a wave thereacross of a higher frequency of a second musical note, gating means coupled to said capacitor means for selectively passing the waves developed thereacross and controlling the attack and decay of the musical notes produced by said waves, and rhythm means coupled to said second means of said control circuit and to said gating means for controlling said second means and said gating means in accordance with a rhythm pattern.

Claim 11

An organ system in accordance with claim 8 wherein said gating means includes means for changing the decay of the waves passed thereby.

Claim 12

An organ system in accordance with claim 8 further including a keyboard coupled to said gating means for controlling the same.

Claim 13

An organ system in accordance with claim 10 including means coupled to said keyboard and to said means for applying current to said capacitor means for controlling such current in accordance with the operation of said keyboard.

Claim 14

An organ system in accordance with claim 10 further including circuit means coupling said rhythm means and said keyboard to said gating means for producing a gating potential and applying such potential to said gating means in response to a pulse from said rhythm means and operation of said keyboard, and means coupled to said circuit means for disabling said circuit means for a predetermined time after the gating potential is produced.

Claim 15

An organ tone generator system including in combination; oscillator means for producing waves corresponding to musical notes, gating means coupled to said oscillator means and responsive to a gating potential for selectively passing the waves from said oscillator means, a control circuit for said gating means for applying a gating potential to said gating means, keyboard means coupled to said Control circuit for selectively applying a potential thereto, rhythm means coupled to said control circuit for applying thereto pulses corresponding to the beats of a rhythm, said control circuit being responsive to the potential from said keyboard and the pulses from said rhythm means to produce a gating potential to operate said gating means to pass the wave from said oscillator means, and disabling means coupled to said control circuit and operative in response to the gating potential to disable said control circuit and prevent the application of the gating potential to said gating means for a predetermined time period.

Claim 16

An organ tone generator system including in combination; oscillator means for producing waves corresponding to musical notes, gating means coupled to said oscillator means and responsive to a gating potential for selectively passing the waves from said oscillator means, a control circuit for said gating means for applying a gating potential to said gating means, keyboard means coupled to said Control circuit for selectively applying a potential thereto, rhythm means coupled to said control circuit for applying thereto pulses corresponding to the beats of a rhythm, said control circuit being responsive to the potential from said keyboard and the pulses from said rhythm means to produce a gating potential to operate said gating means to pass the wave from said oscillator means, and disabling means coupled to said control circuit and operative in response to the gating potential to disable said control circuit and prevent the application of the gating potential to said gating means for a predetermined time period.

Claim 17

The organ tone generator system of claim 13 wherein said control means has an input for receiving pulses from said rhythm means and an output for applying the gating potential to said gating means, and including disabling means coupled from said output to said input for disabling said control means for a predetermined period.

Claim 18

The organ tone generator system of claim 14 wherein said disabling means coupled from said output to said input is a capacitor which applies a disabling potential to said input which decrease exponentially to a value such that said input respond to said pulses applied thereto.

Claim 19

The organ tone generator system of claim 13 wherein said gating means includes first and second gates and said control means includes first and second circuit portions coupled to said first and second gates, respectively, with said first circuit portion causing operation of said first gate in response to the potential from said keyboard and causing further operation of said first gate in response to pulses from said rhythm means.