Amplifier circuit

Details Amplifier circuit Amplifier circuit

2008-01-30

2009-10-06

Choe, Henry K (Department: 2817)

Amplifiers

Combined with automatic amplifier disabling switch means

C330S295000

Reexamination Certificate

active

07598804

ABSTRACT:
There is provided an amplifier circuit including a plurality of unit amplifiers connected in parallel to an input signal terminal, wherein each of the unit amplifiers includes: a first switch switching an input signal inputted from the input signal terminal; a first field effect transistor having a gate connected to the input signal terminal via the first switch and amplifying the input signal of the input signal terminal to output the amplified input signal; a second switch connected in parallel to the first switch and switching the input signal of the input signal terminal at a complementary timing to a switching timing of the first switch; and a capacitor connected to the input signal terminal via the second switch.

REFERENCES:
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patent: 5304943 (1994-04-01), Koontz
patent: 6288608 (2001-09-01), Jadus et al.
patent: 6317002 (2001-11-01), Griffiths
patent: 2008/0238550 (2008-10-01), Sasaki et al.
patent: 06-132746 (1994-05-01), None
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patent: 2000-101371 (2000-04-01), None
patent: 2000-332545 (2000-11-01), None
Jin-Han Yoon et al., “A 900 MHz CMOS RF Power Amplifier with Digitally Controllable Output Power”; Proceedings of IEEE Tencon'; Feb. 2002, pp. 1138-1141.

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