Inside the NE602 single chip, it contains the mixer and the main part that can be used as a local oscillator. It is an eight-pin DIP package. The NE602AD and NE602AN are new and improved ICs. The KSPOWER brand 76W~100W DC adapters is one black or white color constant voltage mode, accepts universal input 100-240V AC voltage and provides the complete power transformers solutions covering the single output voltage ranging from 5Volt to 36Volt and the output current ranging from 100ma to 8000ma. The ac dc power adaptor follows high quality level VI energy efficiency and meet IEC/EN/UL 62368-1 safety standard, with UL/cUL CE FCC KC KCC TUV GS RCM CCC SAA C-Tick UKCA RoHS CB PSE PSB safety certificates export for global countries. The limited power source is Class I and Class II power designed with the standard AC outlet of IEC320-C14, IEC320-C6, IEC320-C8 and offers 3 years after-sale customer service. The external ac power adapter accepts various dc connector size for various audio/video and I.T.E applications and protections for short circuit, over load, over voltage and over temperature with green indication light for power on. power adaptor, dc power adapter, dvr adapter, limited power source, power transformers Shenzhenshi Zhenhuan Electronic Co., Ltd , https://www.szzhpower.com
The inverter in the NE602 is a GTC (Gilbert Transconductance Cell), which has a mixing function but is better than a double balanced inverter (DBM). GTC is so easy to use, so it is not difficult to find traces of GTC among various frequency multipliers and amplitude modulators.
GTC is very different from a balanced-balanced mixer composed of diodes. GTC is composed of active components such as transistors. It has the advantage of high sensitivity and can handle signals as low as microvolts (uV).
This figure is an SSB mixing circuit composed of a common NE602. The internal oscillation circuits of C1, C2, C3, RFC, JT and NE602 form a VXO circuit, and the generated local oscillator signal is sent to the mixer. The frequency sent by the previous stage is 10.700MHz, and the maximum amplitude level does not exceed 68mV (in NE602). The USB signal measured on the 1 pin is also sent to the mixer and finally filtered output. 