Low power consumption oscillator using multiple transconductance amplifiers
US5444421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1994 |
| Grant date | Aug 22, 1995 |
| Priority date | — |
| Expiry date | Feb 10, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0231
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An oscillator circuit includes a multiple output transconductance amplifier having a positive voltage input, a negative voltage input, and three current outputs. A first current output is coupled to the positive input, a second current output is coupled to the negative input, and a third current output provides the full logic voltage oscillator output signal. A resistor network is coupled to the positive voltage input of the transconductance amplifier. The first current output is used to generate a square wave signal at the positive voltage input. A capacitor is coupled to the negative voltage input of the transconductance amplifier. The second current output is used to generate a triangle wave signal at the negative voltage input. Both the square wave and triangle wave have a mean DC level centered halfway between the power supply rails of the transconductance amplifier. The differential voltage between the positive and negative inputs is sensed and converted into a full logic voltage oscillator output signal with the unloaded third current output. If desired, three separate transconductance amplifiers can be used in place of the multiple output transconductance amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.