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US 4,413,237 AGranted
Sawtooth wave oscillator
AssigneeSony Corporation
InventorYasuharu Baba
Life of this patent
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Abstract
A sawtooth wave oscillator is disclosed which includes a series connection consisting of a charging circuit and a first capacitor, a voltage dependent capacitor connected in parallel to the first capacitor, and a discharging circuit connected in parallel to the first capacitor, whereby a sawtooth wave which has good linearity can be generated with a simple circuit construction.
Claims4
A sawtooth wave oscillator comprising:
- (a) a series circuit of a first capacitor means and a charging means for producing a first current;
- (b) a discharging means connected in parallel with said first capacitor means;
- and
- (c) a second capacitor means having a capacitance which decreases in accordance with increase of the reverse bias across said second capacitor means and connected in parallel with said first capacitor means and their terminals connected together wherein decrease of said current due to increase of voltage at the junction point of said charging means and said first capacitor means corresponds to the decrease of capacitance of said second capacitor means, so that the non-linearity sawtooth wave caused by decrease of said first current is improved.
1 more element
Dependencies are inferred from the claim text.