Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2008-04-01
2008-04-01
Hirshfeld, Andrew H. (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C324S076110
Reexamination Certificate
active
10537563
ABSTRACT:
A voltage-impressed current measuring apparatus, wherein the voltage from a direct-current power supply portion is impressed on the terminal of a device under test via a range switching portion and the current flowing in the same terminal is measured; wherein the range switching portion has a plurality of current buffers with switches corresponding to current measurement ranges, and a plurality of current measurement resistances respectively connected in series to the output sides of the same; and wherein the current flowing in the terminal of the device under test is measured by measuring the voltage across both ends of the current measurement resistance of the selected series connection, by a voltage difference measuring portion. Each current buffer with switch has an output stage capable of connection/disconnection in response to a control signal.
REFERENCES:
patent: 3772595 (1973-11-01), De Wolf et al.
patent: 3978402 (1976-08-01), Ryder
patent: 5414352 (1995-05-01), Tanase
patent: 5521493 (1996-05-01), Persons
patent: 6255842 (2001-07-01), Hashimoto
patent: 6940271 (2005-09-01), West
patent: 2002/0171446 (2002-11-01), Takechi et al.
patent: 63082377 (1986-09-01), None
patent: 63-082377 (1988-04-01), None
patent: 05-119110 (1993-05-01), None
patent: 08-054424 (1996-02-01), None
patent: 10-010162 (1998-01-01), None
patent: 2001-166005 (2001-06-01), None
Advantest Corporation
Gallagher & Lathrop
Hirshfeld Andrew H.
Lathrop, Esq. David N.
Mendenhall, Esq. Larry
LandOfFree
Voltage-impressed current measuring apparatus and current... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Voltage-impressed current measuring apparatus and current..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voltage-impressed current measuring apparatus and current... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3917119