摘要:
Differential input voltages (V1, V2) are converted into current unbalances in a parallel-branch circuit (110). A load means (Q5, R3, Q6, R4) converts the sum of the current unbalances to a differential voltage representing the sum of the input voltages.
摘要:
A chopper amplifier and method of operation are described. The chopper amplifier comprises a first chopper arranged to modulate an input signal using a first chopper signal having a chopper frequency. An amplification stage has an input arranged to receive the chopped signal and an output, and supplies an amplified signal at the output. An output chopper is arranged to integrate the amplified signal using a second chopper signal having the chopper frequency to generate an amplified output signal. The amplification stage is further configured to filter the chopped signal to attenuate signal components having frequencies lower than the chopper frequency.
摘要:
An operational amplifier based circuit (100) has an operational amplifier (102), a feedback circuit (104), and a compensation circuit block (106). The feedback circuit (104) is coupled between an output port and an input port of the operational amplifier (102). The compensation circuit block (106) has circuits involved in stability compensation of the operational amplifier (102), wherein there is no stability compensation circuit driven at the output port of the operational amplifier (102).
摘要:
An operational amplifier based circuit (100) has an operational amplifier (102), a feedback circuit (104), and a compensation circuit block (106). The feedback circuit (104) is coupled between an output port and an input port of the operational amplifier (102). The compensation circuit block (106) has circuits involved in stability compensation of the operational amplifier (102), wherein there is no stability compensation circuit driven at the output port of the operational amplifier (102).
摘要:
A wide band amplifier (10) includes a core amplifier (18) having input terminals and output terminals for, respectively, receiving differential input signals and providing amplified differential output signals. A bandwidth peaking network (14) is coupled to the core amplifier and includes (a) a first coil and a first resistor connected in series and (b) a second coil and a second resistor connected in series. The first coil and resistor and the second coil and resistor, respectively, are coupled to the core amplifier for receiving the amplified differential output signals. The bandwidth peaking network (14) is configured to increase the frequency bandwidth of the amplifier.
摘要:
An adaptive current generating circuit having a reference voltage supply circuit (20) for supplying a reference voltage subjected to a fluctuation of supply voltage, a reference current supply circuit (21) for supplying reference current responsive to the reference voltage supplied by the reference voltage supply circuit, a control current supply circuit (22) for supplying control current subjected to the fluctuation of the supply voltage and a bias supply circuit (23) for supplying a bias to the reference current supply circuit (21) corresponding to a difference between the reference current supplied by the reference current supply circuit (21) and the control current supplied by the control current supply circuit (22).