Low power consumption oscillator using multiple transconductance

Details Low power consumption oscillator using multiple transconductance Low power consumption oscillator using multiple transconductance

1994-02-10

1995-08-22

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331108D, 331143, H03K 30231

Patent

active

054444217

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.

REFERENCES:
patent: 4564821 (1986-01-01), Reichart
patent: 5093634 (1992-03-01), Khoury
Ramtron Corporation, R2 92490, Ramtron Brochure, RTx 0801 Ramtag.TM., 256-Bit Passive Nonvolatile RF/ID Tag Engineering Prototype, 1990, pp. 1-6.
Ramtron International Corporation, Ramtron Brochure, FM1208S FRAM.RTM. Memory, 4,096-Bit Nonvolatile Ferroelectric RAM Product Specification, R3 Aug., 1993, pp. 1-8.

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