High voltage amplifier
First Claim
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1. A high voltage amplifier, coupled to a high voltage power supply terminal and having input and output terminals, for amplifying an input voltage signal supplied to said input terminal, said amplifier comprising:
- control means, coupled to said input terminal, for generating an output current signal proportional to said input voltage signal; and
load means, coupled to said control means and to said high voltage power supply terminal, for producing an output voltage signal from said output current, said output voltage signal being proportional to said input voltage signal, said load means including a plurality of MOSFET circuits connected in cascade between said control means and said high voltage power supply terminal, said MOSFET circuits each including a MOSFET having a gate, a source and a drain, and biased in the linear region;
said MOSFET circuits being connected such that the voltage drop across each of said MOSFET circuits is substantially equal.
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Abstract
A voltage amplifier for amplifying an input voltage signal is disclosed. The amplifier includes a string of MOSFET circuits coupled between a voltage-to-current converter and a high voltage power supply terminal. The string of MOSFET circuits may be expanded to achieve linear voltage amplification over a wide voltage range.
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Citations
6 Claims
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1. A high voltage amplifier, coupled to a high voltage power supply terminal and having input and output terminals, for amplifying an input voltage signal supplied to said input terminal, said amplifier comprising:
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control means, coupled to said input terminal, for generating an output current signal proportional to said input voltage signal; and load means, coupled to said control means and to said high voltage power supply terminal, for producing an output voltage signal from said output current, said output voltage signal being proportional to said input voltage signal, said load means including a plurality of MOSFET circuits connected in cascade between said control means and said high voltage power supply terminal, said MOSFET circuits each including a MOSFET having a gate, a source and a drain, and biased in the linear region; said MOSFET circuits being connected such that the voltage drop across each of said MOSFET circuits is substantially equal. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification