H - Electricity – 03 – F
Patent
H - Electricity
03
F
330/104, 330/30,
H03F 1/38 (2006.01) G05F 1/56 (2006.01) G09G 1/04 (2006.01) H03F 1/08 (2006.01) H03F 1/34 (2006.01) H03F 3/30 (2006.01) H03K 6/02 (2006.01) H04N 3/185 (2006.01)
Patent
CA 1140223
Abstract A voltage-to-current converter with improved power supply rejection ratio including output operational amplifier means to substantially supply the power requirements of a load, the output operational amplifier being powered by an unregulated power supply. the output of the operational amplifier is supplied to the load at a predetermined gain which may be symbolized by a feedback loop Z2/Z1 This output operational amplifier is supplied by an additional low-power, high-gain amplifier having very good power supply rejection ratio. The input amplifier has high gain at DC and up to the power supply frequency and including the first few harmonics thereof. The input amplifier is stabilized at high frequency by the provision of a feedback loop which limits the gain of the input amplifier at high frequencies. the feedback loop, however, is 50 designed as to not inter era with the DC and low frequency gain of the amplifier.
323376
Macrae & Co.
Warner-Lambert Company
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