Sawtooth wave form circuit
US4009398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 1975 |
| Grant date | Feb 22, 1977 |
| Priority date | — |
| Expiry date | May 30, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63F2003/00719
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sawtooth wave forming circuit has an input signal alternately applied to the bases of first and a second transistors forming a differential amplifier, and a circuit which permits flow of a current equal to or proportional to the current flowing in the collector of the first transistor is connected between the differential amplifier and a power source. A capacitor is provided between ground and the junction between the circuit and differential amplifier. With this arrangement, the charge-discharge cycle of the capacitor is controlled by means of the input signal. By making use of the sawtooth wave forming circuit constituted in this way, stable trapezoidal or triangular waves having only small fluctuations in the slopes of the sides of the wave can be formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.