Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1990-05-21
1992-09-01
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
3072964, 3072965, 307571, 324 99R, 324115, H03K 1756, G01R 1508
Patent
active
051441543
ABSTRACT:
A range selecting impedance is switched into or out of a parallel range-selecting network by connecting the impedance across the network through an n-channel and a p-channel FET connected in parallel output configuration. The n-channel FET does the switching if the drains are negative with respect to the sources. The p-channel FET does the switching if the drains are positive with respect to the sources. Each FET is controlled by a gate drive whose output waveform is varied to select the rate at which the FETs switch. In cases of several different switched range impedances, the FETs are used to switch the smallest impedance into the network, another range impedance is selected, and then the FETs used to switch the smallest impedance out of the network. In this way, fast glitch-free range switching is achieved.
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Sedra et al., "Microelectric Circuits"; 1982; pp. 251-273.
Cunningham Terry D.
Keithley Instruments Inc.
Miller Stanley D.
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