摘要:
본 고안은 노를 위한 산소 모니터링 시스템에 관한 것이다. 이 시스템은 감지된 산소 신호를 제공하기 위한 산소 센서를 구비한 산소 모니터링 프로브를 포함한다. 또한, 시스템은 감지된 산소 신호를 수신하기 위한 고 입력 임피던스 증폭기를 구비한 판독기를 포함한다. 유리하게는, 고 입력 임피던스 증폭기는 신호 절연 또는 조정을 제공하여 산소 판독값의 오차 불확실성을 줄인다.
摘要:
A Stabilizing circuit (530) is connected to the output of a power amplifier transistor (502) in order to prevent the amplifier from being oscillating. The stabilizing circuit (530) comprises basically a resistor (536) connected in series with a capacitor (534). The stabilizing circuit may also comprise an inductor (532) connected in series to the capacitor and the resistor. The inductor may be partially or fully realised by printed conductive lines and/or bonding wires. The stabilizing circuit provides a low impedance at the transistor output across a range of operational frequencies.
摘要:
PROBLEM TO BE SOLVED: To achieve peaking by a high-frequency amplifier circuit without using LC resonance. SOLUTION: The high-frequency amplifier circuit has a two-stage amplification configuration of a common-emitter amplifier circuit using a transistor Tr1 as a first stage and a common-emitter circuit using darlington-connected transistors Tr2, Tr3 as a second stage. A capacitive element is inserted between an emitter of the transistor Tr1 and a collector of the transistor Tr2. The capacitive element is a diode-connected transistor Tr4, the emitter of the transistor Tr4 is connected to the collector of the transistor Tr2, the base and collector of the transistor Tr4 are connected to the emitter of the transistor Tr1. The diode-connected transistor Tr4 makes a phase shift and provides feedback to improve a gain at a high frequency. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a switched capacitor amplifier circuit which is high-speed and highly accurate. SOLUTION: This switched capacitor amplifier circuit includes: an operational amplifier OA1; a reference signal generation circuit X11 which generates a reference signal VR supplied to the operational amplifier OA1; a first input capacitance C11 connected to a first input terminal of the operational amplifier OA1; a first input switch S15 which transmits a first input signal to the first input capacitance C11; a first feedback capacitance C12 for feeding back an output signal from a first output terminal of the operational amplifier OA1 to the first input terminal; a first feedback switch S12 provided between the first output terminal and the first feedback capacitance C12; and a first reset switch S21 for resetting the charge charged in the first feedback capacitance C12. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide an amplifier circuit capable of suppressing return loss when increasing the amount of gain reduction. SOLUTION: The amplifier circuit includes: a pair of FETs 4, 5 for amplification; a current feedback circuit 15 that is connected between sources of the pair of FETs 4, 5 for amplification and can adjust the amount of gain reduction; and voltage feedback circuits 16, 17 that are connected between the drains and gates of the respective FETs 4, 5 for amplification and can adjust the amount of voltage feedback. The amount of voltage feedback in the respective voltage feedback circuits 16, 17 can be changed according to the amount of gain reduction by the current feedback circuit 15. COPYRIGHT: (C)2010,JPO&INPIT