AM MODULATING CIRCUITPURPOSE:The bias for a low frequency power amplitude circuit is controlled for the detection and smoothening of sound signal in order to obtain an AM modulator circuit having a high availability of power voltage and not requiring a modulation transformer.MARUTSUKA SEKYA...
FSK-AM MODULATION CIRCUIT 专利名称：FSK-AM MODULATION CIRCUIT 发明人：YOKOMIZO TOSHIO,OKAMOTO HIROSHI 申请号：JP30103888 申请日：19881130 公开号：JPH02149035A 公开日：19900607 专利内容由知识产权出版社提供 摘要：PURPOSE:To simplify circuit constitution, and to miniaturize a circuit by constituting the ...
PURPOSE:To eliminate an asymmetric disturbing component by canceling by making use of the property of a symmetric side band characteristic to both side-band amplitude modulation system. CONSTITUTION:The output of intermediate-frequency amplifying circuit 1 is supplied to the 1st synchronous detecting circ...
AM modulation signal and its envelope 3.2 基于 Simulink 的 AM 调制电路及输出波形 3.2.1 AM 调制电路 图 3-3 AM 调制电路 Fig.3-3 AM modulation circuit 7 3.2.2 调制电路参数设置 图 3-4 信号源参数设置 Fig.3-4 Set the source parameter 图 3-5 调制器参数设置 Fig.3-5 Modulator parameter ...
produce AM at high power levels, usually in the i nal amplii er stage of a transmitter. Although the discrete component circuits discussed in the following sections are still used to a limited extent, keep in mind that today most amplitude modulators and demodulators are in integrated-circuit ...
With respect to precise control of the gray level, the time shifts of current pulses are within 11.48 us over the whole grayscale. The improvement in the power consumption of the proposed circuit is more than 21% than that of a circuit that is driven by pulse amplitude modulation....
Design of Multiplier-centered Low-Electric-Level AM Circuit By adopting the amplitude modulation circuit with MC1496 integrated analog multiplier as its core,any modulation of one of the DC parameters would change t... L Zhang - 《Journal of Fuqing Branch of Fujian Normal University》 被引量: ...
Keywords :: Amplitude modulation circuit, Analog systems, Modulator MC1496 chip 1 第一章 绪论 1.1 调幅发射机的基本知识 载波信号被调制,把控制该过程的参数叫做调制。高频的调制信号,是通过改变控制振荡器的振幅来改变振幅调制信号的变化量,而且它们是成正比关系!那这个过程就被叫做幅度调制。经过高频调幅波振荡...
An AM demodulator includes an APC detection circuit that compares phases of an AM-modulated input signal and a signal output from a VCO. However, the APC detection circuit multiples the two signals before their comparison. As a result, even if the phases of the input signal or the signal ou...
widely used in broadcasting, where there is a single transmitter and numerous receivers whose cost should be kept low. In envelope detection the envelope of the modulated signal is detected via a simple circuit consisting of a diode, a resistor, and a capacitor, ...