摘要:
A small signal amplifier with a large signal output boost stage are connected between first and second supply rails. The small signal amplifier receives first and second input signals and provides an output signal at an output node which drives a load. Under small signal conditions, the output signal varies approximately linearly with the difference voltage. However, under large signal conditions, a rail-to-rail large signal output boost stage connected to the output node is arranged to drive the output node close to the first or second supply rail as needed to provide the current demanded by the load. The large signal output boost stage is off in small signal conditions, but comes on rapidly and transfers maximum charge to the load under large signal conditions.
摘要:
An integrated circuit device includes an amplifier circuit that generates an output voltage. A bias control circuit is configured to generate a bias control voltage or the output voltage at an output thereof based on a state of a control signal. An output stage driver circuit that is responsive to the voltage generated at the output of the bias control circuit.
摘要:
A cascode circuit with improved withstand voltage is provided. The cascode circuit includes three or more transistors, such as MOSFET transistors. Each transistor has a control terminal, such as a gate, and two conduction terminals, such as a drain and a source. The conduction terminals are coupled in series between two output terminals, such as where the drain of each transistor is coupled to the source of another transistor. A signal input is provided to the gate for the first transistor. Two or more control voltage sources, such as DC bias voltages, are provided to the gate of the remaining transistors. The DC bias voltages are selected so as to maintain the voltage across each transistor to a level below a breakdown voltage level.
摘要:
An electronic amplifier providing very low distortion which includes an output stage with an output error correction stage containing two amplifiers and wherein there are at least four local negative feedback paths, an output of the first amplifier being connected to an input of output stage transistor buffers or output stage transistors through a first network, an output of the second amplifier being connected to an input of output stage transistor buffers or output stage transistors through a second network, where components of the first and second amplifier the local negative feedback paths, first and second networks and output stage transistor buffers are selected to form substantially second order local dominant pole. Also disclosed is the supply of power to said first and second amplifiers from a floating power supply means coupled to either an or the output of the output stage so that the voltage of the floating power supply will follow substantially an output voltage of the output stage.
摘要:
A stacked power amplifier is provided in which an input signal is independently coupled to each of a series of amplifying devices in the stack. A transformer is used at the input circuit of each device to create an RF swing across each amplifying device which is substantially equal. This results in an equal distribution of RF and DC voltage among the devices in the stack.
摘要:
A CMOS push-pull output buffer (171) is constructed utilizing a plurality of N channel transistors (74, 75, 76) and a plurality of P channel transistors (71, 72, 73) connected in series. The voltages applied to the gates of the N channel transistors and P channel transistors are selected to divide the high voltage (+V) substantially equally across the P channel transistors, when the P channel transistors are turned off, and substantially evenly divide the high voltage across the N channel transistors, when the N channel transistors are turned off.In another embodiment of this invention, selected ones of the N channel and P channel transistors are formed in order to have a high drain to bulk breakdown voltage.In another embodiment of this invention, a plurality of N channel and a plurality of P channel transistors are connected in series and driven by a single ended control voltage (C.sub.N), thus providing a first stage (101) which drives a second stage (100) having a plurality of P channel transistors and a plurality of N channel transistors (110, 111, 112), which provide the high voltage output voltage.In another embodiment of this invention, the first stage (101) is driven by a single ended control voltage (C.sub.N) and serves to drive a second stage (103) comprising a plurality of N channel transistors (110, 111, 112) and a plurality of bipolar transistors (120, 121), whereby said second stage provides the high voltage output signal.
摘要:
A linear amplifier that is able to yield a maximum output voltage substantially greater than the breakdown voltage of the individual amplifying elements used and substantially greater than the voltage of a primary electric energy source that powers the amplifier. The amplifier consists of a plurality of stages connected in cascade, each stage, in turn, controlling the voltage level at which subsequent stages operate.
摘要:
An electronic amplifier circuit including a control transistor connecting a load to a low voltage source in response to a control signal below a prescribed level and control means for switching a high voltage source to said control transistor to energizing said load when the control signal exceeds the prescribed level.